Don't sell at the top with high volume; if there's no volume at the top, run quickly. High trading volume at the top may indicate that prices could continue to rise; however, if trading volume at the top decreases, it shows that upward momentum is insufficient, and it's better to exit quickly.
Don't buy at the bottom with high volume; if there's sustained high volume, it could be a continuation of the decline, so observation is needed; sustained high volume indicates continuous capital inflow, and buying could be considered.
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