it's a multi oscilator found somewhere on the internet.

29 is RSI.

i don't know the rest of the oscilators. I think 18 is Stochastic.
I zipped the set file. Cannot upload .set files here

Changing backstep, indi calculates lines from back points. qsteps how many trendlines to have. If you put qsteps = 2 you will have 4 trendlines and so on.

LevDPI is to have fewer points to connect to have longer trendlines. The higher the value, the longer distance between 2 points, i think. Not sure.