Thank you for the reply still.
I actually found a very simple way to achieve it.
If some day anyone would like to achieve similar result, here is what I did :
FOR i = 0 TO 80 DO
DRAWVLINE(-400 + i*5) ANCHOR(TOPRIGHT, XSHIFT, YSHIFT) COLOURED(30,30,30,255) STYLE(line,5)
NEXT
RETURN
(I used FOR loop but basically what we are doing is drawing a vertical line every 5 unit of X axis like this :
DRAWVLINE(-400)ANCHOR(TOPRIGHT, XSHIFT, YSHIFT)coloured(30,30,30,255)style(line,5)
DRAWVLINE(-395)ANCHOR(TOPRIGHT, XSHIFT, YSHIFT)coloured(30,30,30,255)style(line,5)
DRAWVLINE(-390)ANCHOR(TOPRIGHT, XSHIFT, YSHIFT)coloured(30,30,30,255)style(line,5)
etc… until 0 )
You can modify the -400 value depending from where you wish to hide the price, and then adapt.
At first I tried with DRAWRECTANGLE and FILLCOLOR or BORDERCOLOR and COLOURED, but unfortunately it colored only background and did not cover price and indicators. But DRAWVLINE worked just fine.
So now I can scroll through the chart and having this seemingly “empty space”.