Inverse Head and Shoulders
The head-and-shoulders shape turned upside down: three troughs with the middle one deepest, completing when price closes above the neckline drawn across the two intervening peaks.
Read as a bottom rather than a top, and subject to exactly the same caveat: it requires a prior decline to reverse, and it is not a signal until price closes through the neckline. Bottoming shapes tend to form over more bars than topping ones, because selling that has exhausted itself does so gradually while buying that panics does so at once — which means the same pattern takes longer to confirm here than its mirror image does.