If you're relatively new to the stock market, trading rallies can be somewhat counter-intuitive. That is, winners typically steal the headlines and therefore you'd think the best performers should command your attention.
And they should, but rallies are a good time to look at losers too.
"Suspend the benefit of the doubt," the "Mad Money" host said, "assume everything you own is guilty until proven innocent. Focus on the worst qualities of your stocks, and emphasize the downside. Make each and every stock you own prove to you that it's worth holding all over again."
Largely Cramer views rallies as strategic opportunities to sell stocks, not buy them.
"Therefore, the tougher you are on your portfolio, the better chance you have to lock in gains when you have them," he said.