Any time Jim Cramer sees a day like Tuesday, where the averages start out the day getting hammered and then come roaring back, he wants to know what the heck is driving the psyche of the market. When you know what is driving the tape, then investors can get their favorite stocks at the best prices.

"I like to judge a market based on how stocks react to earnings. If they go higher on better than expected numbers and raised guidance, then I know the market's behaving rationally," the "Mad Money" host said.