Assuming you open a long position with bitcoin at $90000, you will see the position as 1.
Also you open bitcoin long position at $91000, you should see the position as 2.
I means same coins with 2 positions. Just as if you open bitcoin as position 1 and another coin as position 2.
This is not available because just like what you mention it will just average your open position due it’s same coin.
You can use different exchange or another account since exchange like Binance allows multiple account using KYC of family member. This is the method of some trader that wants to open a long and short position at the same time on same coin on indecision market.