Update: Change back so the default behavior is to generate HTF candles from the current timeframes data, since it is both faster and more accurate, except from the Weekly chart that currently always uses HTF data to render candles since candles on higher timeframes can close in the middle o a week. This means that the Weekly timeframe does not work very well with bar replay.
New: New setting "Always use HTF data to generate candles" added. This setting can for example be used if you use intraday data with pre market data, but want to project candles based on non intraday candles not using pre market data.