Markets are driven by emotions and psychology. They are what makes patterns form on charts. Over the past few days, shares of Zscaler, Inc. ZS have been in meltdown mode. They have dropped by more than 20% in just a few days. This is why it's our Stock of the Day. As you can see on the chart, the sell-off paused or maybe even ended right around $156.50. This is the same level that it found support at in late May and early August. This is not a coincidence. There can be support at price levels that was suppo ...