transfer price with different decimal point

I try to using instrument-A for signal generator target, then calculate for instrument-B with its correct pip value. It's correct if I print it with more decimal <ex: print(xxx:10:5)> but actually MC place the orders with instrument-A decimal point.
base data: crude oil 52.18 <signal generator base>
transfer to: mini crude oil 52.175 <order place instrument>
MC will place order with 52.18 and it can't accept by exchange( default round2fraction(52.175) ???)

how I can place the order with correct pip value?

Or may I know which version change the calculate results with base instrument pip value? I'm sure I had experience that one of version with more than 5 decimal point in default, maybe I can use it instead of newest version.