Trader Eugene Ng Ah Sio shares a summary of his recent trades, revealing his significant losses when he went long on SOL. Eugene turned to multiple orders on SOL and its ecosystem after making a profit on BTC, originally setting a medium risk-reward ratio. However, the price of SOL failed to rise as expected, and Eugene did not stop his losses in time. He increased his position when SOL fell to $200, eventually resulting in a loss of $6.20 million, which is about 10.2% of the total account. He reflected that the failure to stop losses decisively and the excessive increase of positions were the key mistakes that led to the loss. Fortunately, in the end he was able to make up for the loss through a series of profitable trades, and concluded the importance of avoiding sunk cost thinking.