Question about styleNoRescale and logarithmic chart

[PeterD]

I have one Bollinger Band indicator (bottom BB thick dark red line) that plots incorrectly when using styleNoRescale and a logarithmic chart.

Without styleNoRescale, log chart looks like this (correct):

With styleNoRescale, here is log with automatic bar height (bottom dark red BB is wrong):

With styleNoRescale, here is linear with manual adjustment of Y axis to show bottom line (correct):

With styleNoRescale, here is log after clicking "Shorter bars" icon as many times as allowed (bottom BB is still wrong but in a different way):

Here is the code for those lines (with styleNoRescale):

Plot( BBandTop( C, BBPeriods, 3 ), "BB3 Top " + BBPeriods, BB3Color, styleThick | styleNoRescale, Null, Null, Null, -2 );
Plot( BBandBot( C, BBPeriods, 3 ), "BB3 Bottom " + BBPeriods, BB3Color, styleThick | styleNoRescale, Null, Null, Null, -2 );
		

Am I not supposed to be using styleNoRescale with a log chart? Or is it something else?

[PeterD]

I just realized that the bad plot of the line occurs when the value of the line dips below zero.

Obviously I can adjust for this by using Max(). But it makes me ask: am I not supposed to use styleNoRescale with a log chart in the first place?

[bysoaa]

Remember that the log function is only defined for values > 0.

[Tomasz]

There must be at least ONE plot without styleNoRescale (i.e. at least ONE plot must be used to actually set the scale).

Also Log charts need data > 0 because logarithm from 0 is minus infinity.

[PeterD]

That makes sense. Thanks!

[PeterD]

Thanks for letting me know, that makes sense.