Understanding of the state of bot Positions if there is trade occur in the loop

Created at 05 Oct 2021, 05:05

Joined 05.10.2021

Understanding of the state of bot Positions if there is trade occur in the loop
05 Oct 2021, 05:05

Hi,

I will like to understand more when we execute bot.Positions.

Example:

foreach (var pos in this.bot.Positions.Where(x => x.SymbolName == this.symbol.Name))
{
TradeResult res = this.bot.ExecuteMarketOrder(this.currDirection, this.symbol.Name, inputLot, this.symbol.VolumeInUnitsToQuantity(inputLot).ToString());

// INSIDE HERE
}

What will happen to the Positions state if we perform close trade/execute trade/modify trade during the looping?

Will the looping immediately include the newly opened trade into the Positions? And will the Positions count will increase?

https://100001.link/ https://192168101.dev/ https://1921681254.link/

The Positions state still remains as previous(before closing the trade until I exited the loop?

Thanks

@elysecooper

Replies

amusleh
05 Oct 2021, 18:43

Hi,

Positions collection is an IEnumerable, and if you open a new position or close an old one the collection will change.

If collection change while you were iterating over it (with a loop) you will get a collection modified exception and your loop will break.

To protect your bot or indicator from collection modified exception you can create a local copy of positions collection and then loop over it:

var positionsCopy = Positions.ToArray();

foreach (var position in positionsCopy)
{
// Do something
}

@amusleh

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