Learning from the past. Patterns before a bear market

Looking back to the 2000, and 2008 crashes of SPX, our current pattern looks nearly identical to the signs of the bear market. My trading strategy here is to buy when we approach the lower support line, then short within the red box, or if we break the lower support entirely, I will short earlier. Short term, buy the dip, long term, short the crash. I don't know where the bottom will be at this point, so I intend to hold the short until signs show the crash is over, or major quantitative easing is announced.