Here is SKippy Blair on WCS anchors. An ANCHOR is an “away” connection from one partner’s center (CPB) to the other partner’s center. It can easily be achieved by both partners placing their Center Point of Balance (CPB) BEHIND the heel of their forward foot. This strengthens the partner connection at the point where the anchor takes place. This also alerts each partner that they have completed what they intended and are now ready to move on. So, she uses the word connection, rather than pressure. The WCS anchor is a rather special case. That "away" pressure" shows up mostly at slower speeds when dancing to something like the song "Steam." The lack of the awayness is quite noticeable if it's not there. When it is there, there is a definate feeling of resistance and stretching when the man starts back on the next step. We feel the same awayness when doing colgadas in Argentine Tango, or when doing single axis turns, or, really, in a fast waltz. I can get it in a CW two step, too. In these examples it's a result of centrifugal force from the rotation.