Plot a marker on a prior bar based on current bar calc  [SOLVED]

In the following, what do I replace Bars.Low[0] with to place the marker on the prior bar instead of the one that just closed? Google only gets you so far...

Many thanks


if (PublicFunctions.DoubleGreaterEquals(m_value1.Value, consecutivebarsdown)){
Plot1.Set(0, Bars.Low[0]);

Nevermind, changing the zeroes to other integers works--very logical!