トレードの記録方法、特に分割売買時の記録について混乱しています

Ah, the joys of trying to make a dynamic process fit a static record. It's like trying to perfectly document a game of chess where you're allowed to move multiple pieces at once. I usually treat each 'trade' as the entire move from first entry to final exit, with individual scaling actions noted within that larger trade's notes. Otherwise, you end up with a hundred 'trades' for one actual idea, which quickly becomes its own kind of messy.