I'm looking to model my commissions and had some questions about the constantslippagemodel.

Suppose I bought and sold 10 units.

The slippage would occur on both sides of this trade, correct?

So suppose I have a slipage model set to 0.0001m, this would be 1 pip, and so if I had this on a forex algorithm, it would be 2 pips in commisisons (buy, and sell) that would add to the spread, so a 4 pip spread would become 6 pips in commissions, right?