"There's been a stair-stepping down" in Coinbase (COIN), says Brett Crowther. He looks at the past 5 days and the continued downward pressure weighing on shares of the crypto company. "It just continues to break through one support level after another," he adds. On a 1-year timeframe, he says it "doesn't look that much different" pointing to prior broken support zones at $228 and $190. Brett adds $145 as the next area to watch, especially as the company has earnings ahead on Feb. 12.