When a runner is on second the catcher will give several signs in a row and it is up to the pitcher to decode it. Sometimes the first sign indicates the "real"

When a runner is on second the catcher will give several signs in a row and it is up to the pitcher to decode it. Sometimes the first sign indicates the "real" sign in the series, most of time time the pitcher just knows "sign N is always the real one" or something like that.