One version of TD Combo requires that combo day 10 is recorded and for 11,12 and 13 th day only condition that C13>C12>C11>C10 ,the other conditions are relaxed in case of sell combo. Mirror image for buy combo ie C13<C12<C11<C10.
But terminal 13 can also be applied to combo though DeMark does not say so,but TD Sequential and Combo are templates and we can improve them with our own study and observation.
Smart_trade