If you have a strong business, perfectly designed, expertly executed, then its share price can soar far above the market average, towards the shining sun of all time highs. But — just like Icarus — the wax can also melt and the wings also fail, and its price plummet, down and down to the waiting ocean. The moral of the story is: while top gainers can represent opportunities to trade bullish momentum, they can also represent a peak, and could just as easily see a future decline in share price. It's down to your skill as a trader to make the best call as to what the reality is most likely, based on all the information laid out before you.