Is there a delay in executing decrease/increase position size? I assume there is, otherwise you can abuse the system by opening a small position and increasing the size easily?
As a trader, having delayed execution where price can lead to slippage is really not acceptable. I understand that you can adjust slippage tolerance, but this would really stop my usage of the platform. Volatility is what drives trades, and if I am unable to enter or exit a position consistently, then I cannot rely on the platform.
5-30 second delay is truly too long.
What happens to stop losses? Do they trigger on time, or do they also take 5-30 seconds?
If you are planning trades that you will hold under long periods of time then this change doesn’t affect you, but neither would the 1.5% mark price movement. So I really struggle to see who this change will benefit? You can always offset the 1.5% mark price restriction by taking a short on the same instrument, which is an alternative to taking profit, but at least you can mitigate your risk this way.
Being unable to predict execution price just makes up way too much risk.