I've never used this platform and I cannot seem to find anything on their website to answer this question... Do they offer the ability to do sim trading (not backtesting, I'm talking live data with a sim account)? And if so, does anyone have an opinion of how realistic it is on something liquid like ES? For instance, I've played around with Ninja Trader using their market replay and the fills seem a bit too liberal. Wondering if Rithmic is about the same? Or perhaps they wait for a level to be run over before they consider a resting limit order filled. Which appears (not positive) to be what IB does. Thanks