forked from rosh/MQL5Book
78 lines
2.9 KiB
MQL5
78 lines
2.9 KiB
MQL5
//+------------------------------------------------------------------+
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//| UseStochastic.mq5 |
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//| Copyright 2021, MetaQuotes Ltd. |
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//| https://www.mql5.com |
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//+------------------------------------------------------------------+
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#property indicator_separate_window
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#property indicator_buffers 2
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#property indicator_plots 2
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// drawing settings
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#property indicator_type1 DRAW_LINE
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#property indicator_color1 clrBlue
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#property indicator_width1 1
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#property indicator_label1 "St'Main"
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#property indicator_type2 DRAW_LINE
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#property indicator_color2 clrChocolate
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#property indicator_width2 1
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#property indicator_label2 "St'Signal"
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#property indicator_style2 STYLE_DOT
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input int KPeriod = 5;
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input int DPeriod = 3;
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input int Slowing = 3;
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input ENUM_MA_METHOD Method = MODE_SMA;
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input ENUM_STO_PRICE StochasticPrice = STO_LOWHIGH;
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// indicator buffer
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double MainBuffer[];
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double SignalBuffer[];
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// global variable for subordinate indicator
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int Handle;
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//+------------------------------------------------------------------+
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//| Custom indicator initialization function |
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//+------------------------------------------------------------------+
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int OnInit()
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{
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IndicatorSetString(INDICATOR_SHORTNAME,
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StringFormat("Stochastic(%d,%d,%d)", KPeriod, DPeriod, Slowing));
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// map arrays to indicator buffers
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SetIndexBuffer(0, MainBuffer);
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SetIndexBuffer(1, SignalBuffer);
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// obtain Stochastic handle
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Handle = iStochastic(_Symbol, _Period,
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KPeriod, DPeriod, Slowing, Method, StochasticPrice);
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// this is a trick to detect if we create indicator which is already running
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// if so, we can read data right away
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double array[];
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Print("This is very first copy of iStochastic with such settings=",
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!(CopyBuffer(Handle, 0, 0, 10, array) > 0));
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return Handle == INVALID_HANDLE ? INIT_FAILED : INIT_SUCCEEDED;
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}
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//+------------------------------------------------------------------+
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//| Custom indicator iteration function |
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//+------------------------------------------------------------------+
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int OnCalculate(const int rates_total,
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const int prev_calculated,
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const int begin,
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const double &data[])
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{
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// wait until the subindicator is calculated for all bars
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if(BarsCalculated(Handle) != rates_total)
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{
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return prev_calculated;
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}
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// copy data from subordinate indicator into our buffers
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const int n = CopyBuffer(Handle, 0, 0, rates_total - prev_calculated + 1, MainBuffer);
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const int m = CopyBuffer(Handle, 1, 0, rates_total - prev_calculated + 1, SignalBuffer);
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return n > -1 && m > -1 ? rates_total : 0;
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}
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//+------------------------------------------------------------------+
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