Well, if i understand correctly, you would like to make the stairstep moving average calculated with something else than a classical candle close? And in your case, that would be the close of a renko box? (or my so called indicator..:) )

First, you’ll have to adapt the renko indicator with a new variable that deal with what is the current close. Because indicators are often calculated on Close, my renko box indicator does not have one.

if(close > topprice + boxsize*2) THEN
   topprice = close
   bottomprice = topprice - boxsize*2
   boxclose = topprice
ELSIF (close < bottomprice - boxsize*2) THEN
   bottomprice = close
   topprice = bottomprice + boxsize*2 
   boxclose = bottomprice
ELSE
   topprice = topprice
   bottomprice = bottomprice
   boxclose = boxclose
ENDIF

Then, instead of having :

MA = average[MAperiod](close)

You should make :

MA = average[MAperiod](boxclose)

But you have to merge the 2 indicators first. Let me know if it works like you want.

Here is the full indicator code :

//parameters :
// boxsize = 100 //1 hour timeframe default size, adapt it for your
// Step = 0.0010 forex 10 pips, adapt to item you are trading
// MAperiod = 20

boxsize = 100*pipsize
Step = 10*pipsize
MAperiod = 20

once topprice = close
once bottomprice = close - boxsize*2
once ssMA = close

if(close > topprice + boxsize*2) THEN
  topprice = close
  bottomprice = topprice - boxsize*2
  boxclose = topprice
ELSIF (close < bottomprice - boxsize*2) THEN
  bottomprice = close
  topprice = bottomprice + boxsize*2
  boxclose = bottomprice
ELSE
  topprice = topprice
  bottomprice = bottomprice
  boxclose = boxclose
ENDIF

MA = average[MAperiod](boxclose)

if(MA > ssMA + Step) THEN
  ssMA = MA
ELSIF (MA < ssMA - Step) THEN
  ssMA = MA
ELSE
  ssMA = ssMA
ENDIF

RETURN ssMA

Hey Sofitech, does it work like you want?