I guess the only way to stop strategies being stopped due to rejected orders then is to get IG to increase the tolerance before a ‘too many requests’ error occurs but I guess the downside to this is that the market may have moved a long way from the desired price?

It seems that we just have to price in stopped strategies and orphaned trades as part of our risk and watch our auto strategies like hawks – which kind of makes using auto-trading instead of manual trading rather pointless.

An auto-strategy with only a small edge could quickly be turned to a big losing strategy by just one orphaned trade.