Hey, I am a brown belt at my TJJ dojo, and we practice some ne waza (BJJ style ground grappling) every week. Recently, I have been finding myself in position for a toe hold quite often, but have never been able to finish it. I get my inside hand on the top of my opponent's foot, and use my outside hand to get under his achilles and grap my own wrist. From there, however, I can never actually get the tap, no matter how much pressure I try to put on. Any suggestions? Does the leg have to be straight or something like that? Thanks for the help!