How can I hide the traces of cancelled orders on the chart history, because when there are a lot of trades, they get in the way a bit?

: Interface configuration

If you have cancelled emulator orders, you can hide them in the strategy settings on the User Interface tab, if you check the DontKeepOrdersOnChart=YES parameter. The real orders will always remain on the chart.nBut you can also right-click on the Use multi orders (M) button and in the “Opacity” setting use the slider to the left to reduce or remove both cancelled and executed orders. This is useful when you work with a frequent grid of orders or there are many deals on the chart.