YSG...........WTRH............OPTT..........AMPE..........https://stockcharts.com/h-sc/ui?s=YSG&p=D&yr=0&mn=2&dy=12&id=p84071410134 https://stockcharts.com/h-sc/ui?s=WTRH&p=D&yr=0&mn=2&dy=12&id=p84071410134 https://stockcharts.com/h-sc/ui?s=OPTT&p=D&yr=0&mn=2&dy=12&id=p84071410134 https://stockcharts.com/h-sc/ui?s=AMPE&p=D&yr=0&mn=2&dy=12&id=p84071410134