$DOGE shows everyone the impact of fees on high-frequency trading. The first chart does not include fees, and through strict profit-taking and stop-loss measures, stable profits can be achieved. However, adding a 0.05% fee to a single trade directly drops the positive return from 70% to a negative return of -6%. Therefore, I have basically given up on high-frequency trading; this is something that only large capital players with negative fees can engage in.