Historically, October has been an important month to the downside for the stock market. It was the month that kicked off the Great Depression in 1929 and Black Monday in 1987. But Jim Cramer wants investors to remember that it can be a bullish month, with this month as the best so far in 2015, even if Friday ended on a sour note.

"One thing is for certain, with the Fed on hold, earnings were once again able to drive stock prices. I know that sounds obvious, but until this earnings season came around, the performance of individual stocks were pretty much in thrall to the S&P futures," the "Mad Money" host said.