Two +250 point spikes at 21:15 & 22:00 each day is clearly an error, but the really worrying thing is the fact that this doesn’t appear in PRT charts or backtesting results. It’s as if PRT demo uses IG’s LIVE price feed for charting, but the IG DEMO price feed for the actual strategy execution. Which, as everyone has said, makes backtesting/demo walk forward impossible to use with any confidence. I mean, how many other (smaller) discrepancies have there been that have gone unnoticed, but have caused differences between live demo / demo backtest?