FLATTENEVERYTHING vs CLOSEPOSITION

[ATI user]

please explain the difference, if any, between sending an OIF to CLOSEPOSITION and FLATTENEVERYTHING

my main concern is if FLATTENEVERYTHING is safer as it can not result in a race condition as it just closes anything open and cancels any order

however CLOSEPOSITION may result in an exception if there are no open positions...or...maybe if long it sends a sell which can result in a reverse if the race is lost

[NinjaTrader_JoshP]

Close position closes any already open positions at the time you sent the order. While it is closing that position you could have filled another order and still be left with an open position from such an in flight execution.

FlattenEverything tries to cancel open orders first to ensure no inflight executions come in. That is the difference.

Of course you can use ClosePosition in the same vein as FlattenEverything if you just manually cancel all your orders yourself and wait for confirmation on those cancels before submitting ClosePosition.