TheStreet's Jim Cramer says he's watching for further developments out of Greece and China. He believes that this weekend is when we'll find out whether Greece is in or out. He says even just a resolution of the situation will be positive. Cramer tells investors to watch the FXE, the ETF that measures the strength of the U.S. dollar versus the euro. He says we need to see the FXE go higher because that means the dollar gets weaker. If we see that, and we get any sort of resolution out of Greece, then our stock market could go higher not lower, he says. Moving on to China, Cramer says 'understand when they criminalize some selling, when they literally make it so that the police are going to go after you and they make it so that the big blocks of stock can't be sold, you're actually going to get real buyers.' Cramer adds that we got some real buyers in America to come into China to buy the Chinese stocks that look like American stocks such as Baidu (BIDU). Cramer says he does not trust the Chinese market and he feels we've gotten linked to China in a terrible way, saying 'the moment that China started trading up last night, the S&P futures traded up. This is a treacherous thing. We don't want to be levered to China, we don't want to be levered to Europe.'