How to plot the projected high and low of the current rangebar.
First, create a custom indicator called ProjHi with this syntax (LO + MAX(HI.1 - LO.1, 2)) * (POS = 1)
where POS is setup as "bars from end of data"
Then create another custom indicator called ProjLo with this syntax (HI - MAX(HI.1 - LO.1, 2)) * (POS = 1)
Now, add the Price Bands Indicator to your chart, setup as follows: