Oh dear, I only now read your guiding sentence to the IG email :

Absolute wrote:

I use an ATR based TP and SL – Are they possibly responsible for the tripping of Algo’s during times of very limited volume ?

All right, more blahblah :

THIS is actually the real reason I stopped my system on the 24th; there is something with the Volume which is not right. So if you could re-interpret my posts/sentences about not wanting to be in there, this was all about the too low volume which can’t even be measured well. 2 days ago I also made that topic about when Volume is used, all chokes for backtesting (in my situation).

I repeat from elsewhere : I was told (not my own observation) that the Volume is not available to PRT-IG, but that with some tricks around ticks the volume can be mimicked.
Now I finally saw this crucial guiding first sentence and understand better (ahem), I can see a difference between your EUR/USD Mini and what I do myself with the normal EUR/USD (10 times larger). It tells me that I should revisit my “volume” findings by observing the smaller Mini contracts and obtain better resolution ?

Apologies for all the rambling. It intrigues …

Algos may stop due to “0”result of an indicator or by PRT launching orders to iG without Ig accepting them.

Due to the timeframe IF you miss place the order on the last few decs of the candle and the order arrives to iG late, you’ll have a refusal cause PRT will be validated to place the order when the new candle has already started.

This said, you must turn ON the option to LEAVE OPEN your position IF the algo falls… they executed you cause you did not select that you wanted to keep them open if PRT algo are shut or fail