forked from rosh/MQL5Book
111 lines
4.2 KiB
MQL5
111 lines
4.2 KiB
MQL5
//+------------------------------------------------------------------+
| |
//| IndColorWPR.mq5 |
| |
//| Copyright 2021, MetaQuotes Ltd. |
| |
//| https://www.mql5.com |
| |
//+------------------------------------------------------------------+
| |
#property copyright "2021, MetaQuotes Ltd."
| |
#property link "https://www.mql5.com"
| |
#property description "Larry Williams Percent Range Colored"
| |
| |
// indicator settings
| |
#property indicator_separate_window
| |
#property indicator_maximum 0.0
| |
#property indicator_minimum -100.0
| |
| |
// indicator buffers and plots
| |
#property indicator_buffers 2
| |
#property indicator_plots 1
| |
#property indicator_type1 DRAW_COLOR_LINE
| |
#property indicator_color1 clrDodgerBlue,clrGreen,clrRed
| |
| |
// indicator levels
| |
#property indicator_level1 -20.0
| |
#property indicator_level2 -80.0
| |
#property indicator_levelstyle STYLE_DOT
| |
#property indicator_levelcolor clrSilver
| |
#property indicator_levelwidth 1
| |
| |
#include "..\..\Include\IndCommon.mqh"
| |
| |
// input parameters
| |
input int WPRPeriod = 14; // Period
| |
| |
// indicator buffers
| |
double WPRBuffer[];
| |
double WPRColors[];
| |
| |
//+------------------------------------------------------------------+
| |
//| Custom indicator initialization function |
| |
//+------------------------------------------------------------------+
| |
void OnInit()
| |
{
| |
// check input value validity
| |
if(WPRPeriod < 1)
| |
{
| |
Alert(StringFormat("Incorrect Period value (%d). Should be 1 or larger", WPRPeriod));
| |
}
| |
| |
// map indicator buffer
| |
SetIndexBuffer(0, WPRBuffer);
| |
SetIndexBuffer(1, WPRColors, INDICATOR_COLOR_INDEX);
| |
| |
// notify other programs about empty first elements in our buffer
| |
PlotIndexSetInteger(0, PLOT_DRAW_BEGIN, WPRPeriod - 1);
| |
| |
// set name for Data Window and indicator subwindow caption
| |
IndicatorSetString(INDICATOR_SHORTNAME, "%R" + "(" + (string)WPRPeriod + ")");
| |
IndicatorSetInteger(INDICATOR_DIGITS, 2);
| |
}
| |
| |
//+------------------------------------------------------------------+
| |
//| Williams Percent Range |
| |
//+------------------------------------------------------------------+
| |
int OnCalculate(ON_CALCULATE_STD_FULL_PARAM_LIST)
| |
{
| |
// skip calculations on insufficient data or invalid period
| |
if(rates_total < WPRPeriod || WPRPeriod < 1) return 0;
| |
| |
// since we set PLOT_DRAW_BEGIN property
| |
// we don't need an explicit clean-up if this indicator is supposed
| |
// to provide data to other indicator via 'Apply to' feature,
| |
// but we still need it if this indicator is called from other MQL5 code
| |
if(prev_calculated == 0)
| |
{
| |
if(rates_total > TerminalInfoInteger(TERMINAL_MAXBARS))
| |
{
| |
PrintFormat("Warning: oldest historic bars are hidden (available=%d, visible=%d)",
| |
rates_total, TerminalInfoInteger(TERMINAL_MAXBARS));
| |
}
| |
ArrayFill(WPRBuffer, 0, WPRPeriod - 1, EMPTY_VALUE);
| |
}
| |
| |
// main cycle of WPR calculation with update of the last bar
| |
for(int i = fmax(prev_calculated - 1, WPRPeriod - 1); i < rates_total && !IsStopped(); i++)
| |
{
| |
double max_high = high[fmax(ArrayMaximum(high, i - WPRPeriod + 1, WPRPeriod), 0)];
| |
double min_low = low[fmax(ArrayMinimum(low, i - WPRPeriod + 1, WPRPeriod), 0)];
| |
if(max_high != min_low)
| |
{
| |
WPRBuffer[i] = -(max_high - close[i]) * 100 / (max_high - min_low);
| |
}
| |
else
| |
{
| |
WPRBuffer[i] = WPRBuffer[i - 1];
| |
}
| |
| |
// default color is clrDodgerBlue
| |
WPRColors[i] = 0;
| |
// if new value goes over upper level, color it with clrRed
| |
if(WPRBuffer[i] > -20) WPRColors[i] = 2;
| |
// otherwise if it goes below lower level, color it with clrGreen
| |
else if(WPRBuffer[i] < -80) WPRColors[i] = 1;
| |
| |
/*
| |
// alternative (more strict) coloring with analysis of both adjacent points
| |
if(WPRBuffer[i] > -20 && WPRBuffer[i - 1] > -20) WPRColors[i] = 2;
| |
else if(WPRBuffer[i] < -80 && WPRBuffer[i - 1] < -80) WPRColors[i] = 1;
| |
*/
| |
}
| |
return rates_total;
| |
}
| |
//+------------------------------------------------------------------+
|