The Fed's low interest rates could bring a "scary" 50-60 percent market correction, technical analyst Abigail Doolittle told CNBC on Wednesday. "Unfortunately, I think it could come on a crash similar to what happened in 2007," the founder of Peak Theories Research said on " Squawk Box " a day after the S&P 500 closed above the 2,000 level for the first time ever. "It's tough to know what the exact catalyst will be. But that's the very nature of that kind of selloff. They start slowly and then happen very suddenly." Doolittle pointed to a 20-year chart of the...