Don't know if this of any use ?
It's from Leon Wilson's " The Next Step " page 235
Referring to CountBack & Reversal Set-Ups
The following formula will identify the lowest low of a bullish reversal and plot it at the point of conclusion through the application of the MetaStock expert.
(Ref(HIGH,-2)>Ref(HIGH,-1)AND Ref(HIGH,-1)>HIGH)AND
(Ref(LOW,-2)>Ref(LOW,-1)AND Ref(LOW,-1)>LOW)AND
(Ref(HIGH,+2)>Ref(HIGH,+1)AND Ref(HIGH,+1)>HIGH)AND
(Ref(LOW,+2)>Ref(LOW,+1)AND Ref(LOW,+1)>LOW);
The MetaStock exploration formula for bullish short term reversals :
(Ref(LOW,-4)>Ref(LOW,-3)AND Ref(LOW,-3)>Ref(LOW,-2)AND
(Ref(LOW,-2)<Ref(LOW,-1)AND Ref(LOW,-1)<LOW)AND
(Ref(HIGH,-4)>Ref(HIGH,-3)AND rEF(HIGH,-3)>Ref(HIGH,-2)AND
(Ref(HIGH,-2)<Ref(HIGH,-1)AND Ref(HIGH,-1)<HIGH)
PHEEEW !!!