how does MT4 draw and plots?

Quoting jjk2

Disliked

im curious how mt4 recognizes how to draw

is it hte setindexdrawbegin that initiates it?

or the start() loop that automatically will plot.

im trying to plot the SMA of a prices generated by some formula.

so far, its drawing a single horizontal line. maybe something wrong with my formula im using? its a mashup of ema's on closing prices.

Ignored

Quoting yohan_ip

Disliked

hello there
are you drawing an indicator or an experts?
it would be helpfull if you post your code here

Ignored

int start()
  {
   int counted_bars = IndicatorCounted();
 
   if (counted_bars<0) return(-1);
 
   if (counted_bars>0) counted_bars--;
 
   int pos = Bars - counted_bars; 
   while(pos>=0)
      {
 
         SetIndexBuffer(0,ExtMapBuffer1);
         double hybrid_result = iMA(NULL,0,2,0,MODE_SMA, Close[pos],0);
          ExtMapBuffer1[pos] = hybrid_result;
           pos--;        
      }
 
}