Wall Street legend sums up technical analysis in one sentence

Louise Yamada, who spent 25 years of her career as the top technical analyst for Citigroup and now runs her own firm, summed up in one sentence the simplest method of using charting to make more money trading.

"The bigger the base, the higher in space; the bigger the top, the bigger the drop," Yamada said in the exclusive interview for CNBC PRO, describing the simple pattern she looks for in a stock chart every time to tell her what's going to happen next.

In this extensive strategy session about technical analysis hosted by CNBC's Mike Santoli earlier this week, Yamada describes how to spot this pattern. The analyst also shares her investment outlook and showcases her technical skills in a number of current charts. PRO members can access the full interview here.