@def I will definitively do that as soon as The issue will re-appear. As stated before, the delay tend to appear during period of high volatility in the markets. It happened a while ago for a couple of days and every day March 2020.(especially overnight, trading DAX if my memory serve me well) Hence my speculation that was caused by additional checking of margin or whatever introduced by IB. Strange thing as reported in my previous post, is that adaptive order are affected while "straight" lmt-mkt order are less affected. Currently there are no issue to report to You, everything is working as expected.