Shares fall after new figures show tough times could lie ahead for eBay.
'I do believe that maybe it goes a little bit lower, but I want you to buy it,' Cramer says.
In 1997, the E-mini opened up trading to a new breed of online trader, paving the way for electronic futures markets.
There's no need to be gluttonous on market share just yet.
Stocks closed mixed on Friday as the Nasdaq and S&P 500 fell and the Dow gained.
We strongly recommend you look at this chart.
Worrying about the next market crash? Jim Cramer gives some advice.