Long holder, so whilst not phased by daily movements its always...

Long holder, so whilst not phased by daily movements its always nice seeing the price elevated. I don't use TA other than looking at basic support/resistance levels for initial entries, but to contribute and try help steer this thread back on topic with intended discussion

How do you TA boys on the breaking of resistance/support when volume is low. In this particular instance I know 16c was regarded as a resistance point? with low volume do you view it as a low strength breakthrough with risk to return below? or is there a point where it extends far enough above/below that it is viewed as strong despite the volume. At time of posting I saw price at 17.5 which is a few pips above. If volume remains important, what extent of volume is deemed sufficient in some of your eyes.