How to create MQL5 Keltner Channel programmatically

External question — Stack Overflow Stack Exchange Author: Geraldo Isaaks Original post: https://stackoverflow.com/questions/78196888 License: CC BY-SA 4.0 — https://creativecommons.org/licenses/by-sa/4.0/ Adaptation: HTML converted to plain text; contact email addresses removed. I'm trying to create/use Keltner Channel indicator in my MQL5 Expert Advisor but for some reason it is not working. I know that at the moment MQL5 doesn't have a built-in indicator, so I am trying to manually create one using the following code, can anyone please assist in fixing the problem: In the OnInit() function: int bars = iBars(NULL, TimeFrame); ArrayResize(upperKeltner, bars); ArrayResize(lowerKeltner, bars); double atr = iATR(_Symbol, _Period, 14); for(int i = 0; i < count; i++) { double typical_price = (iOpen(_Symbol, _Period, i) + iHigh(_Symbol, _Period, i) + iLow(_Symbol, _Period, i)) / 3.0; upperKeltner[i] = typical_price + atr * 1.5; lowerKeltner[i] = typical_price - atr * 1.5; } In the OnTick() function: ArrayResize(upperKeltner, 1); ArrayResize(lowerKeltner, 1); CopyBuffer(handleKeltner, 0, 0, 1, upperKeltner); CopyBuffer(handleKeltner, 1, 0, 1, lowerKeltner);

External answer — Stack Overflow Stack Exchange Author: joserogerio84 Original post: https://stackoverflow.com/a/78211234 License: CC BY-SA 4.0 — https://creativecommons.org/licenses/by-sa/4.0/ Adaptation: HTML converted to plain text; contact email addresses removed. To create a indicator, you has to place the code in the OnCalculate function. What error is happening? In the CodeBase already has the Indicator. https://www.mql5.com/pt/code/16740

External answer — Stack Overflow Stack Exchange Author: Boyka Smith Original post: https://stackoverflow.com/a/78518031 License: CC BY-SA 4.0 — https://creativecommons.org/licenses/by-sa/4.0/ Adaptation: HTML converted to plain text; contact email addresses removed. In MQL5, indicator values are stored in buffer.So use CopyBuffer(...) function to get values. This function works well. I will give you the code I have ever experienced. int handleKeltner; double upperKeltner[], lowerKeltner[]; OnInit(){ handleKeltner = (declare Keltner indicator) } OnTimer(){ CopyBuffer(handleKeltner, 0, 0, 1, upperKeltner); CopyBuffer(handleKeltner, 1, 0, 1, lowerKeltner); double curUpperKeltner = upperKeltner[0], curUpperKeltner = lowerKeltner[0]; } Following me leads to Success.