How to get the fixed minimun and fixed maximun of a indicator in mql4 ?

[nelson]

I need get the value of fixed minimun or fixed maximun of a indicator for example the MACD how can i do it in mql4? it's that possible 

[honest_knave]

Find the subwindow (use WindowFind() if necessary) then use:

ChartGetDouble(0,CHART_FIXED_MAX,1);

 where "1" is the subwindow

[nelson]

thanks very much :)