The market is experiencing a nice rally today and it should be enjoyed, Jim Cramer said on his "RealMoney" radio show Wednesday. However, it's not because Ben Bernanke spoke, he said. Rather, the Standard & Poor's oscillator, a measure of whether the market is overbought or oversold, came in at minus four today -- that's the reason behind the rally. We are oversold, Cramer said. "When we get minus four on the S&P oscillator, we always get a snap back rally within a couple of days," he said. Sellers have become exhausted and have stopped selling. Although Bernanke did speak today, he said the same thing he always does -- that he's going to look at the data. It's not like he doesn't see what's been going on in the market, Cramer said, adding that people need to understand Bernanke did not trigger this rally, but that people don't want to sell when stocks have gone low enough. We have plenty of bad news right now, Cramer said. Before the market opened this morning, the consumer price index number that was awful, he said, adding that ADC Telecommunications ( ADCT) reported a massive shortfall and Yahoo! ( YHOO), which he owns for his charitable trust, Action Alerts PLUS , missed its quarter and is down hideously. The fact that we are oversold is what's driving the rally. We need to focus on what really drives the tape and it's that we got too negative, he said. He advised people to sell a little bit of their gains on the way up. "When you're up huge, you take a little off," he said. "Remember we're going to get overbought again. Enjoy yourself, but don't be greedy." To see the most recent edition of The RealMoney Radio Recap in its entirety, please click here. This recap is published every day around 3 p.m. ET.