106 lines
8.1 KiB
Plaintext
106 lines
8.1 KiB
Plaintext
//+------------------------------------------------------------------+
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//| Difference2.mq5 |
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//| Copyright 2018, MetaQuotes Software Corp. |
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//| https://mql5.com |
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//+------------------------------------------------------------------+
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#property copyright "Copyright 2018, MetaQuotes Software Corp."
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#property link "https://mql5.com"
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#property version "1.00"
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#property description "Difference oscillator"
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#property indicator_separate_window
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#property indicator_buffers 3
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#property indicator_plots 1
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//--- plot Diff
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#property indicator_label1 "Difference"
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#property indicator_type1 DRAW_COLOR_HISTOGRAM
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#property indicator_color1 clrGreen,clrRed
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#property indicator_style1 STYLE_SOLID
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#property indicator_width1 2
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//--- enums
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enum ENUM_CALC_TYPE
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{
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TYPE_ABS, // Absolute
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TYPE_RLTV // Relative
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};
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//--- input parameters
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input uint InpPeriod = 10; // Period
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input ENUM_CALC_TYPE InpCalcType = TYPE_ABS; // Calculation type
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input ENUM_APPLIED_PRICE InpAppliedPrice = PRICE_CLOSE; // Applied price
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//--- indicator buffers
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double BufferDiff[];
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double BufferColors[];
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double BufferMA[];
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//--- global variables
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int period;
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int handle_ma;
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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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//--- set global variables
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period=int(InpPeriod<1 ? 1 : InpPeriod);
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//--- indicator buffers mapping
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SetIndexBuffer(0,BufferDiff,INDICATOR_DATA);
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SetIndexBuffer(1,BufferColors,INDICATOR_COLOR_INDEX);
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SetIndexBuffer(2,BufferMA,INDICATOR_CALCULATIONS);
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//--- setting indicator parameters
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IndicatorSetString(INDICATOR_SHORTNAME,"Difference OSC ("+(string)period+")");
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IndicatorSetInteger(INDICATOR_DIGITS,Digits());
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//--- setting buffer arrays as timeseries
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ArraySetAsSeries(BufferDiff,true);
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ArraySetAsSeries(BufferColors,true);
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ArraySetAsSeries(BufferMA,true);
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//--- create MA's handles
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ResetLastError();
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handle_ma=iMA(NULL,PERIOD_CURRENT,1,0,MODE_SMA,InpAppliedPrice);
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if(handle_ma==INVALID_HANDLE)
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{
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Print("The iMA(1) object was not created: Error ",GetLastError());
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return INIT_FAILED;
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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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//--- Проверка и расчёт количества просчитываемых баров
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if(rates_total<period) return 0;
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//--- Проверка и расчёт количества просчитываемых баров
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int limit=rates_total-prev_calculated;
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if(limit>1)
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{
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limit=rates_total-period-2;
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ArrayInitialize(BufferDiff,EMPTY_VALUE);
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ArrayInitialize(BufferMA,0);
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}
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//--- Подготовка данных
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int count=(limit>1 ? rates_total : 1),copied=0;
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copied=CopyBuffer(handle_ma,0,0,count,BufferMA);
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if(copied!=count) return 0;
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//--- Расчёт индикатора
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for(int i=limit; i>=0 && !IsStopped(); i--)
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{
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double ma0=BufferMA[i];
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double ma1=BufferMA[i+period];
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BufferDiff[i]=(InpCalcType==TYPE_ABS ? ma0-ma1 : 100.*(ma0-ma1)/(ma1!=0 ? ma1 : 1.0));
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BufferColors[i]=(BufferDiff[i]<BufferDiff[i+1] ? 1 : 0);
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}
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//--- return value of prev_calculated for next call
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return(rates_total);
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}
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//+------------------------------------------------------------------+
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