01
A visible purchase may be only one leg of a position. Your available quote may already differ; incoming transfers may not be purchases. Match transaction hashes and time before comparing results.
02
Fictional example: nine $1 wins and one $20 loss give a 90% win rate but a net $11 loss before costs. Position size also matters: equal percentage returns can produce different dollar results.
03
Record the observation time, network, contract, public trade, your available quote and later outcome. Keep unsuccessful examples too. GMGN labels and historical profits are not safety guarantees or proof of replicability.