MQL4 Reference 
Window functions WindowFind
| int WindowFind( |
string name) |
If indicator with name was found, the function returns the window index containing this specified indicator, otherwise it returns -1.
Note: WindowFind() returns -1 if custom indicator searches itself when init() function works.
Parameters:
| name |
- |
Indicator short name. |
Sample:
int win_idx=WindowFind("MACD(12,26,9)");
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