MQL4参考 自定义指标 SetIndexEmptyValue

MQL4参考

SetIndexEmptyValue

Sets drawing line empty value.

void  SetIndexEmptyValue(
   int     index,       // line index
   double  value        // new "empty value"
   );

Parameters

index

[in]  Line index. Must lie between 0 and 7.

value

[in]  New "empty" value.

Returned value

None.

Note

Empty values are not drawn or shown in the DataWindow. By default, empty value is EMPTY_VALUE.

Example:

int init()
  {
//---- 2 allocated indicator buffers
    SetIndexBuffer(0,ExtUppperBuffer);
    SetIndexBuffer(1,ExtLowerBuffer);
//---- drawing parameters setting
    SetIndexStyle(0,DRAW_ARROW);
    SetIndexArrow(0,217);
    SetIndexStyle(1,DRAW_ARROW);
    SetIndexArrow(1,218);
//---- 0 value will not be displayed
    SetIndexEmptyValue(0,0.0);
    SetIndexEmptyValue(1,0.0);
//---- displaying in DataWindow
    SetIndexLabel(0,"Fractal Up");
    SetIndexLabel(1,"Fractal Down");
//---- initialization done
   return(0);
  }

See also

Custom Indicator Properties