75 lines
3.2 KiB
Markdown
75 lines
3.2 KiB
Markdown
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# int _AppliedTo
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The _AppliedTo variable allows finding out the type of data, used for indicator calculation:
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| Data type | Meaning | Description of data used for indicator calculation. |
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| --- | --- | --- |
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| — | 0 | The indicator uses the second OnCalculate() call form - the data for calculation are not specified by a certain buffer or data array |
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| Close | 1 | Close prices |
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| Open | 2 | Open prices |
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| High | 3 | High prices |
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| Low | 4 | Low prices |
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| Median Price (HL/2) | 5 | Median price = (High+Low)/2 |
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| Typical Price (HLC/3) | 6 | Typical price = (High+Low+Close)/3 |
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| Weighted Price (HLCC/4) | 7 | Weighted price = (Open+High+Low+Close)/4 |
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| Previous Indicator's Data | 8 | Data of the indicator, which was launched on the chart before this indicator |
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| First Indicator's Data | 9 | Data of the indicator, which was launched first on the chart |
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| Indicator handle | 10+ | Data of the indicator, which was passed to the iCustom() function using the indicator handle. The _AppliedTo value contains the indicator handle |
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Example:
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```
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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,Label1Buffer,INDICATOR_DATA);
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// Getting the type of data used for indicator calculation
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Print("_AppliedTo=",_AppliedTo);
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Print(getIndicatorDataDescription(_AppliedTo));
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//---
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return(INIT_SUCCEEDED);
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}
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//+------------------------------------------------------------------+
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//| Description of data used for indicator calculation |
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//+------------------------------------------------------------------+
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string getIndicatorDataDescription(int data_id)
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{
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string descr="";
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switch(data_id)
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{
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case(0):descr="It's first type of OnCalculate() - no data buffer";
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break;
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case(1):descr="Indicator calculates on Close price";
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break;
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case(2):descr="Indicator calculates on Open price";
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break;
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case(3):descr="Indicator calculates on High price";
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break;
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case(4):descr="Indicator calculates on Low price";
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break;
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case(5):descr="Indicator calculates on Median Price (HL/2)";
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break;
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case(6):descr="Indicator calculates on Typical Price (HLC/3)";
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break;
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case(7):descr="Indicator calculates on Weighted Price (HLCC/4)";
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break;
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case(8):descr="Indicator calculates Previous Indicator's data";
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break;
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case(9):descr="Indicator calculates on First Indicator's data";
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break;
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default: descr="Indicator calculates on data of indicator with handle="+string(data_id);
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break;
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}
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//---
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return descr;
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}
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```
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See also
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[ENUM_APPLIED_PRICE](/en/docs/constants/indicatorconstants/prices#enum_applied_price_enum)
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