What is Sizing strategy?
How a copied trade's size is calculated. Proportional mirrors the whale's conviction — you spend the same fraction of your balance the whale spent of theirs. Fixed copies a flat amount up to your cap. Proportional is more honest: a big whale buy makes a big copy, a small one a small copy.
Example
Whale committed 10% of their balance; you have $500 → a $50 copy (× copy_ratio, within your caps).