Ken Calhoun's article, “Mean-Reversion Swing Trading”, presented a visual trading system designed to take advantage of pullbacks in uptrends.  The formula below, used as a filter in the explorer, will find such trading opportunities.   The first two lines of the formula allow the user to adjust the parameters of the scan: 

"Z" is the minimum percentage increase in the initial upswing.

"fudge" is the percentage difference allowed between the close on the pullback and the actual 50% mean reversion.

The formula is presented using values of 10% minimum move and a 0.1% allowance on the difference at the reversion level.

Exploration filter: 

z:= 10;
fudge:= 0.1; 
p1:= LastValue(TroughBars(1, C, z));
pv1:= Trough(1, C,z);
p2:= LastValue( HHVBars( C, p1 ));
pv2:= HHV( C, p1);
meanrev:= (pv1 + pv2) / 2;
pv3:= LLV(C, p2);
p1 < PeakBars(1, C, z) AND pv2 >= pv1 * (1 + (z/100)) AND Ref(Abs(pv3 - meanrev) <= pv3 * (fudge/100), -1) AND C > Ref(C, -1) AND LLVBars(C, p2) = 1 AND pv1 >= 20 AND pv2 <= 70

Edited by user Monday, July 31, 2017 5:14:20 PM(UTC)  | Reason: Not specified