Coding for Dummies
94 lines
3.5 KiB
Plaintext
94 lines
3.5 KiB
Plaintext
//+------------------------------------------------------------------+
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//| Bollinger bands %b.mq5 |
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//| Copyright 2014, mohsen khashei |
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//| mkhashei@gmail.com |
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//+------------------------------------------------------------------+
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#property copyright "Copyright 2014, mohsen khashei"
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#property link "mkhashei@gmail.com"
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#property version "1.10"
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#property indicator_separate_window
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#property indicator_buffers 4
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#property indicator_plots 1
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//--- plot Label1
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#property indicator_label1 "Bollinger bands %b"
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#property indicator_type1 DRAW_LINE
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#property indicator_color1 clrYellow
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#property indicator_style1 STYLE_SOLID
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#property indicator_width1 1
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#property indicator_level1 0.0
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#property indicator_level2 0.5
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#property indicator_level3 1.0
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//---- input parameters
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input int BBPeriod=20; //Period
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input int BBShift=0; // Shift
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input double StdDeviation=2.0; //Standard Deviation
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input ENUM_APPLIED_PRICE appliedprc=PRICE_CLOSE; //Applied Price
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//--- indicator buffers
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double UpperBuffer[];
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double LowerBuffer[];
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double MiddleBuffer[];
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double BLGBuffer[];
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int bbhandle;
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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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//--- indicator buffers mapping
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SetIndexBuffer(0,BLGBuffer,INDICATOR_DATA);
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SetIndexBuffer(1,MiddleBuffer,INDICATOR_CALCULATIONS);
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SetIndexBuffer(2,UpperBuffer ,INDICATOR_CALCULATIONS);
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SetIndexBuffer(3,LowerBuffer ,INDICATOR_CALCULATIONS);
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ArraySetAsSeries(BLGBuffer,true);
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ArraySetAsSeries(MiddleBuffer,true);
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ArraySetAsSeries(UpperBuffer,true);
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ArraySetAsSeries(LowerBuffer,true);
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if(Bars(_Symbol,_Period)<60)
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{
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Alert("We have less than 60 bars for Indicator exited now!!");
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return (-1);
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}
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bbhandle=iBands(NULL,0,BBPeriod,BBShift,StdDeviation,appliedprc);
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if(bbhandle<0){
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Alert("Can not create handle ",GetLastError(),"!!");
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return (-1);
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}
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//---
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return(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 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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//---
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ArraySetAsSeries(close,true);
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if(BarsCalculated(bbhandle)<rates_total) return(0);
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if(CopyBuffer(bbhandle,0,0,rates_total,MiddleBuffer)<=0) return (0);
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if(CopyBuffer(bbhandle,1,0,rates_total,UpperBuffer)<=0) return (0);
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if(CopyBuffer(bbhandle,2,0,rates_total,LowerBuffer)<=0) return (0);
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int pos=prev_calculated-1;
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if(pos<0) pos=0;
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for(int i=pos; i<rates_total-(BBPeriod+BBShift+1); i++)
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{
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BLGBuffer[i]=(close[i]-LowerBuffer[i])/(UpperBuffer[i]-LowerBuffer[i]);
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}
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return(rates_total);
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}
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//+------------------------------------------------------------------+
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