A quick explanation of average entry price:
Reducing a position usually doesn’t affect the average entry price of the remaining position, while adding to a position recalculates the average price.
The breakeven price is the price at which you neither profit nor lose after accounting for trading fees and funding fees: for a long position, it’s usually slightly above the average entry price; for a short position, it’s usually slightly below.
When setting take-profit targets or estimating the price needed to break even, include opening and closing fees as well as any funding fees already paid.
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This is solely a personal opinion; please consider it rationally.