MQL4 Reference 
Window functions WindowPriceMin
| double WindowPriceMin( |
int index=0) |
Returns minimal value of the vertical scale of the specified subwindow of the current chart
(0-main chart window, the indicators' subwindows are numbered starting from 1). If the subwindow
index has not been specified, the minimal value of the price scale of the main chart window is returned.
See also WindowPriceMax(), WindowFirstVisibleBar(), WindowBarsPerChart()
Parameters:
| index |
- |
Chart subwindow index (0 - main chart window). |
Sample:
double top=WindowPriceMax();
double bottom=WindowPriceMin();
datetime left=Time[WindowFirstVisibleBar()];
int right_bound=WindowFirstVisibleBar()-WindowBarsPerChart();
if(right_bound<0) right_bound=0;
datetime right=Time[right_bound]+Period()*60;
//----
ObjectCreate("Padding_rect",OBJ_RECTANGLE,0,left,top,right,bottom);
ObjectSet("Padding_rect",OBJPROP_BACK,true);
ObjectSet("Padding_rect",OBJPROP_COLOR,Blue);
WindowRedraw();
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