Save data for partial trade with IOG on  [SOLVED]

Having trouble identifying and recording the exit price for a trade that closes out part of a position.
Attempting to print to a file various variables and prices when a partial trade is made. Using Marketposition works when the entire position is closed as it changes from 1 to 0 and I can record the tick when that happens. For a partial position, Marketposition remains at 1. I thought I could use CurrentShares and identify the tick when the number is reduced. What I found was that CurrentShares apparently only changes at the close of the bar, not at each tick. What other identifying characteristic can I use to locate the exact tick when a partial position is closed out?

I think the PosTrade* keywords might be of help to you.

Thanks much Josh, I will take a look at those. Wasn't aware of them before.

Thanks Josh, found a couple of things in that list that are extremely helpful and solved my problem.