Sharp upjet of STO %K over %D.
In the case of INWK this is caused by short covering after some sort of news. The shorts create buy pressure because they have to repurchase the stock to close.
I'd be wary of INWK in particular because of the resistance at 4.84 and decreasing volume, but despite that, this is the type of STO we're looking for in our run.
http://stockcharts.com/h-sc/ui?s=INWK&p=D&yr=0&mn=4&dy=1&id=p51583562949