How to enter in a Buy or Sell when market price reach an Indicator value

I would like to use the polygonal regression real-time value to enter in a Sell or a Buy.

That indicator has the following outputs:

sqh3, sqh2, sqh, prc, sql, sql2; sql3;

My questions are:

1) In the parameter section

How to make 2 selection boxes, one to select one of the output to enter in a Buy and one to select one of the output to enter in a sell?

2) In the trading section

How to enter a Buy and a Sell when the market tick last value reach the selected output last value?

#) For a Buy or a Sell, I want to be able to enter separately  in the parameter section conditions like order size Sl in pips and expiration date for the order

How to get these inputs in the parameters?

How to implement the inputs in the trading section?

Thanks for your assistance