As far as I understand, fees and spreads can significantly impact on profit. You need to understand the impact of fees and spreads. Work on strategies such as broker with competitive fees and tight spreads.
limit orders rather than market orders.
They can effect your trades and profit
fixed spreads i prefer them
because they can help you to know how much you need to pay and they will not change
and fees are you asking about deposit fee? or what?
I assume that it's rationally to switch the broker in case it levies too big fees or spreads are too wide. The latter depends on the current market condition, pool of liquidity providers and so on.
As for the fees then I am for cost-effective brokers, which don't levy inactivity fees, swaps, and actually have no commissions, or at least offer accounts where you pay only the spread.
So if you realize that the biggest part of your deposit is eaten by commissions or other stuff, then think of changing the broker.
I think it depends, as always.
Some traders, including me, don’t pay attention to spreads whatsoever.
They don’t choose brokers according to this aspect and that’s because of their trading approach that is not sensitive to the tightness of spreads in the first place.
But if you are a scalper that trades within the spread range, then of course you should take that into consideration. Actually this would be the first thing that you notice.