lower prior high / higher prior low
prior high / prior low
pivotal high/Low (the high/low prior to the actual high/low)
key high/low (the high/low following the actual high/low)
sleeper
lower prior high / higher prior low
prior high / prior low
pivotal high/Low (the high/low prior to the actual high/low)
key high/low (the high/low following the actual high/low)
sleeper