never chase a low pitch with your back leg, that puts you into a dip position, and you will lose power. just as your front foot hits the ground, you should be in the launch position.
the draw is the upper body's version of the stride. they take place at the same time. while in the stride, you are building power by reaching your lower body forward. with the draw you build power by reaching your upper body backward. think of this, after the stride and draw, you are in the launch position. from here on out, your only movements will be straight to, and through the ball. so it stands 