$DE40

Hey everyone, fairly new to actively trading CFDs and trying to get my head around the true cost of holding positions overnight, especially on indices like $US30 or $DE40. I get the financing charges, and those are clear enough. But then there's the 'rollover' adjustment. Sometimes it seems negligible, other times it feels like a significant chunk, even on a modest position. I've read the broker's explanation a few times, about interest rate differentials and dividend adjustments, but it still feels a bit opaque in practice. Is there a simple rule of thumb or a way to forecast these better, or is it just one of those things you bake into your risk-sizing and accept as a fluctuating holding cost? Just trying to avoid any nasty surprises.

Been looking at the DAX $DE40 lately, specifically through CFDs. The swings can be pretty wild, especially around economic data. I'm comfortable with the general principles of risk per trade, but when you're anticipating a move and want to scale in or add to a position, how do you adjust your initial size to allow for that without blowing past your risk threshold too quickly? Do you treat each 'add' as a separate trade with its own risk, or is it all part of a larger planned allocation?