Extend horizontal line plot

March 28th, 2011, 12:00 AM

Hi all,

Is it possible to plot something on a PREVIOUS bar based on a condition met by a LATER bar?

For example, this script creates a lateral boundaries based on the logic that two inside bars followed an initial bar, and bars 4+ closed within the range of the initial bar. The only problem is because the condition to generate the lateral lines is only met by the 3rd bar, I cannot get the line to extend to the first two bars retroactively. Any guidance would be appreciated.

Here's the code:

Code

declare upper;
declare real_size;
rec inLateralBar3 = high[0] <= high[2] && high[1] <= high[2] && low[0] >= low[2] && low[1] >= low[2];
rec inLateralBar4 = inLateralBar3[1] && close <= high[3] && close >= low[3]; 
rec inLateralBar5 = inLateralBar4[1] && close <= high[4] && close >= low[4];

plot LatTop = if inLateralBar3[0] then (high[2])
    else if InLateralBar4[0] then (high[3]) 
    else if inLateralBar5[0] then (high[4])
    else Double.NAN;
LatTop.SetPaintingStrategy(PaintingStrategy.HORIZONTAL);
LatTop.SetDefaultColor(Color.yellow);
LatTop.SetLineWeight(2);
LatTop.HideBubble();
LatTop.HideTitle();

plot LatBot = if inLateralBar3[0] then (low[2])
    else if InLateralBar4[0] then (low[3]) 
    else if inLateralBar5[0] then (low[4])
else Double.NAN;
LatBot.SetPaintingStrategy(PaintingStrategy.HORIZONTAL);
LatBot.SetDefaultColor(Color.yellow);
LatBot.SetLineWeight(2);
LatBot.HideBubble();
LatBot.HideTitle();

Result:

h t t p : / / content.screencast.com/users/anon233/folders/Snagit/media/36c8dab3-91c3-4445-9152-e42ab04a5f1b/03.27.2011-20.57.25.png

(sorry, can't post images -- don't have 5 posts yet)