284 lines
12 KiB
MQL5
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//| LW_MarketStructure_SMC.mq5 |
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//| SMC Market Structure — Swing H/L + BOS + CHoCH |
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//| Author : Yeoh Joo Yam | Display: Lonely Wolf |
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//| 2026-07-02 v1.00 |
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//| |
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//| - Swing High/Low via N-bar fractal (InpSwingN each side). |
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//| - BOS (Break of Structure) = close breaks last swing in the |
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//| direction of the current trend -> continuation (green). |
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//| - CHoCH (Change of Character) = close breaks last swing against |
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//| the current trend -> possible reversal (red). |
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//| - QML (Quasimodo) = on a CHoCH, dotted level at the left-shoulder |
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//| swing (sell=prev high / buy=prev low) = retrace entry level. |
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//+-------------------------------------------------------------------+
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#property copyright "Lonely Wolf"
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#property version "1.10"
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#property description "SMC Market Structure: fractal swing H/L + BOS (continuation) + CHoCH (reversal) + Order Blocks + FVG + QML (Quasimodo) level on reversals. Close-confirmed. All drawn on the chart."
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#property strict
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#property indicator_chart_window
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#property indicator_buffers 2
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#property indicator_plots 2
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//--- Plot 0: Swing High marker (down arrow at the high)
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#property indicator_label1 "Swing High"
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#property indicator_type1 DRAW_ARROW
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#property indicator_color1 clrDodgerBlue
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#property indicator_width1 1
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//--- Plot 1: Swing Low marker (up arrow at the low)
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#property indicator_label2 "Swing Low"
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#property indicator_type2 DRAW_ARROW
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#property indicator_color2 clrLimeGreen
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#property indicator_width2 1
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//============================== INPUTS ===============================
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input int InpSwingN = 5; // Fractal bars each side (swing sensitivity; higher = fewer/bigger)
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input bool InpBreakOnClose = true; // Confirm break on candle CLOSE (false = wick)
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input int InpMaxBars = 1500; // How many recent bars to analyze
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input color InpBOSColor = clrLimeGreen; // BOS = continuation
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input color InpCHoCHColor = clrRed; // CHoCH = reversal
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input bool InpShowLines = true; // Draw the broken-level line
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input bool InpShowLabels = true; // Draw BOS / CHoCH text
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input bool InpShowFVG = true; // Draw Fair Value Gaps (3-candle imbalance)
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input color InpFVGColor = clrGoldenrod; // FVG fill color (brighter = easier to see on black)
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input bool InpShowOB = true; // Draw Order Blocks (last opposite candle before a break)
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input color InpOBBullColor = clrLimeGreen; // Bullish Order Block
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input color InpOBBearColor = clrRed; // Bearish Order Block
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input bool InpShowQML = true; // Draw QML (Quasimodo) level on CHoCH reversals
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input color InpQMLColor = clrMagenta; // QML level (left-shoulder) dotted line
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//============================== BUFFERS ==============================
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double SwingHighBuf[];
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double SwingLowBuf[];
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//============================== STATE ================================
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const string OBJ_PREFIX = "LWMS_";
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datetime g_lastBarTime = 0;
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//============================== INIT =================================
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int OnInit()
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{
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SetIndexBuffer(0, SwingHighBuf, INDICATOR_DATA);
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SetIndexBuffer(1, SwingLowBuf, INDICATOR_DATA);
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PlotIndexSetInteger(0, PLOT_ARROW, 234); // down arrow, sits at swing high
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PlotIndexSetInteger(1, PLOT_ARROW, 233); // up arrow, sits at swing low
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PlotIndexSetDouble(0, PLOT_EMPTY_VALUE, 0.0);
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PlotIndexSetDouble(1, PLOT_EMPTY_VALUE, 0.0);
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ArraySetAsSeries(SwingHighBuf, false);
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ArraySetAsSeries(SwingLowBuf, false);
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IndicatorSetString(INDICATOR_SHORTNAME, "LW Market Structure (SMC)");
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return INIT_SUCCEEDED;
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}
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//+------------------------------------------------------------------+
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//| |
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//+------------------------------------------------------------------+
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void OnDeinit(const int reason)
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{
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ObjectsDeleteAll(0, OBJ_PREFIX);
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}
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//============================== DRAW HELPERS =========================
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void DrawBreak(const datetime &time[], int fromBar, int atBar,
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double level, bool bullish, bool isBOS)
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{
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color clr = isBOS ? InpBOSColor : InpCHoCHColor;
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string tag = isBOS ? "BOS" : "CHoCH";
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string arr = bullish ? " ^" : " v";
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string base = OBJ_PREFIX + (string)atBar;
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if(InpShowLines)
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{
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string ln = base + "_ln";
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ObjectCreate(0, ln, OBJ_TREND, 0, time[fromBar], level, time[atBar], level);
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ObjectSetInteger(0, ln, OBJPROP_COLOR, clr);
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ObjectSetInteger(0, ln, OBJPROP_STYLE, isBOS ? STYLE_SOLID : STYLE_DASH);
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ObjectSetInteger(0, ln, OBJPROP_WIDTH, 1);
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ObjectSetInteger(0, ln, OBJPROP_RAY_RIGHT, false);
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ObjectSetInteger(0, ln, OBJPROP_BACK, true);
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ObjectSetInteger(0, ln, OBJPROP_SELECTABLE, false);
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}
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if(InpShowLabels)
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{
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string tx = base + "_tx";
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ObjectCreate(0, tx, OBJ_TEXT, 0, time[atBar], level);
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ObjectSetString(0, tx, OBJPROP_TEXT, tag + arr);
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ObjectSetInteger(0, tx, OBJPROP_COLOR, clr);
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ObjectSetInteger(0, tx, OBJPROP_FONTSIZE, 9);
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ObjectSetInteger(0, tx, OBJPROP_ANCHOR, bullish ? ANCHOR_LOWER : ANCHOR_UPPER);
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ObjectSetInteger(0, tx, OBJPROP_SELECTABLE, false);
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}
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}
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//+------------------------------------------------------------------+
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//| |
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//+------------------------------------------------------------------+
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void DrawBox(string name, datetime t1, double p1, datetime t2, double p2, color clr, bool fill)
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{
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ObjectCreate(0, name, OBJ_RECTANGLE, 0, t1, p1, t2, p2);
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ObjectSetInteger(0, name, OBJPROP_COLOR, clr);
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ObjectSetInteger(0, name, OBJPROP_FILL, fill);
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ObjectSetInteger(0, name, OBJPROP_BACK, true);
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ObjectSetInteger(0, name, OBJPROP_WIDTH, 1);
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ObjectSetInteger(0, name, OBJPROP_SELECTABLE, false);
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}
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// QML (Quasimodo): after a CHoCH, the "left shoulder" swing = the entry level.
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// Bearish QML (sell) = left-shoulder HIGH ; Bullish QML (buy) = left-shoulder LOW.
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// Dotted horizontal line extended right = the level price may retrace into.
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void DrawQML(const datetime &time[], int shoulderBar, int atBar, double level, bool bullish)
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{
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string base = OBJ_PREFIX + "qml" + (string)atBar;
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string ln = base + "_ln";
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ObjectCreate(0, ln, OBJ_TREND, 0, time[shoulderBar], level, time[atBar], level);
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ObjectSetInteger(0, ln, OBJPROP_COLOR, InpQMLColor);
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ObjectSetInteger(0, ln, OBJPROP_STYLE, STYLE_DOT);
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ObjectSetInteger(0, ln, OBJPROP_WIDTH, 1);
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ObjectSetInteger(0, ln, OBJPROP_RAY_RIGHT, true); // extend right = retrace target
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ObjectSetInteger(0, ln, OBJPROP_BACK, false);
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ObjectSetInteger(0, ln, OBJPROP_SELECTABLE, false);
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string tx = base + "_tx";
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ObjectCreate(0, tx, OBJ_TEXT, 0, time[atBar], level);
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ObjectSetString(0, tx, OBJPROP_TEXT, bullish ? "QML (buy)" : "QML (sell)");
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ObjectSetInteger(0, tx, OBJPROP_COLOR, InpQMLColor);
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ObjectSetInteger(0, tx, OBJPROP_FONTSIZE, 9);
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ObjectSetInteger(0, tx, OBJPROP_ANCHOR, bullish ? ANCHOR_UPPER : ANCHOR_LOWER);
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ObjectSetInteger(0, tx, OBJPROP_SELECTABLE, false);
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}
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//============================== ON CALCULATE =========================
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int OnCalculate(const int rates_total,
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const int prev_calculated,
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const datetime &time[],
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const double &open[],
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const double &high[],
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const double &low[],
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const double &close[],
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const long &tick_volume[],
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const long &volume[],
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const int &spread[])
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{
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if(rates_total < InpSwingN * 2 + 5)
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return rates_total;
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// Only recompute on a new bar (breaks are close-confirmed anyway)
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if(time[rates_total - 1] == g_lastBarTime && prev_calculated > 0)
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return rates_total;
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g_lastBarTime = time[rates_total - 1];
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// Reset our drawings + buffers for the analysis window
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ObjectsDeleteAll(0, OBJ_PREFIX);
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for(int i = 0; i < rates_total; i++)
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{
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SwingHighBuf[i] = 0.0;
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SwingLowBuf[i] = 0.0;
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}
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int start = MathMax(InpSwingN, rates_total - InpMaxBars);
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//--- Pass 1: mark fractal swing highs / lows
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for(int i = start; i < rates_total - InpSwingN; i++)
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{
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bool isHigh = true, isLow = true;
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for(int k = 1; k <= InpSwingN; k++)
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{
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if(high[i] <= high[i - k] || high[i] <= high[i + k])
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isHigh = false;
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if(low[i] >= low[i - k] || low[i] >= low[i + k])
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isLow = false;
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}
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if(isHigh)
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SwingHighBuf[i] = high[i];
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if(isLow)
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SwingLowBuf[i] = low[i];
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}
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//--- Pass 1b: Fair Value Gaps (3-candle imbalance, drawn over the gap)
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if(InpShowFVG)
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{
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for(int i = start + 1; i < rates_total - 1; i++)
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{
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if(low[i + 1] > high[i - 1]) // bullish FVG (gap up)
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DrawBox(OBJ_PREFIX + "fvg" + (string)i, time[i - 1], high[i - 1],
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time[i + 1], low[i + 1], InpFVGColor, true);
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else
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if(high[i + 1] < low[i - 1]) // bearish FVG (gap down)
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DrawBox(OBJ_PREFIX + "fvg" + (string)i, time[i - 1], low[i - 1],
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time[i + 1], high[i + 1], InpFVGColor, true);
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}
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}
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//--- Pass 2: BOS / CHoCH state machine
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int trend = 0; // 1 = up, -1 = down, 0 = neutral
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double refHigh = 0.0; // last swing-high level to break (bullish)
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double refLow = 0.0; // last swing-low level to break (bearish)
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int refHighBar = -1, refLowBar = -1;
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bool haveHigh = false, haveLow = false;
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// "left shoulder" = the swing BEFORE the current one (used for QML)
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double prevHigh = 0.0, prevLow = 0.0;
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int prevHighBar= -1, prevLowBar = -1;
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for(int i = start + InpSwingN; i < rates_total; i++)
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{
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int j = i - InpSwingN; // swing confirmed at bar i sits at bar j
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if(SwingHighBuf[j] > 0.0)
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{
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prevHigh = refHigh;
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prevHighBar = refHighBar;
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refHigh = high[j];
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refHighBar = j;
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haveHigh = true;
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}
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if(SwingLowBuf[j] > 0.0)
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{
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prevLow = refLow;
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prevLowBar = refLowBar;
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refLow = low[j];
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refLowBar = j;
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haveLow = true;
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}
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double upPx = InpBreakOnClose ? close[i] : high[i];
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double downPx = InpBreakOnClose ? close[i] : low[i];
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// Bullish break of the last swing high
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if(haveHigh && upPx > refHigh)
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{
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bool isBOS = (trend != -1); // up-break with up/neutral trend = BOS; against down trend = CHoCH
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DrawBreak(time, refHighBar, i, refHigh, true, isBOS);
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if(InpShowOB) // Bullish OB = last DOWN candle before this up-break
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for(int b = i; b > refHighBar; b--)
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if(close[b] < open[b])
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{ DrawBox(OBJ_PREFIX+"ob"+(string)b, time[b], high[b], time[i], low[b], InpOBBullColor, true); break; }
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// Bullish QML: CHoCH up (reversal from down) -> left shoulder = prev swing LOW = buy level
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if(InpShowQML && !isBOS && prevLowBar >= 0)
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DrawQML(time, prevLowBar, i, prevLow, true);
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trend = 1;
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haveHigh = false; // level consumed; next swing high sets a new one
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}
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// Bearish break of the last swing low
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else
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if(haveLow && downPx < refLow)
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{
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bool isBOS = (trend != 1); // down-break with down/neutral trend = BOS; against up trend = CHoCH
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DrawBreak(time, refLowBar, i, refLow, false, isBOS);
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if(InpShowOB) // Bearish OB = last UP candle before this down-break
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for(int b = i; b > refLowBar; b--)
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if(close[b] > open[b])
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{ DrawBox(OBJ_PREFIX+"ob"+(string)b, time[b], high[b], time[i], low[b], InpOBBearColor, true); break; }
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// Bearish QML: CHoCH down (reversal from up) -> left shoulder = prev swing HIGH = sell level
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if(InpShowQML && !isBOS && prevHighBar >= 0)
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DrawQML(time, prevHighBar, i, prevHigh, false);
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trend = -1;
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haveLow = false;
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}
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}
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return rates_total;
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}
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//+------------------------------------------------------------------+
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