Just to be clear, what you call a low volume test is a situation following a high candle where you have a 'hammer' or any candle with few to no price move ? Or you only look for long wicks?
Hello my friend!
I've added the -from book- definition in this comment. In my personal opinion, that is what you want to look for at first, but often times the price does not do exactly that, with this in mind I consider to be a low volume test (on a bullish scenario):
One or more down bars (after the break with nice volume to the upside) with volume decreasing or relative low (relative to the moment, for example in the middle of London or NY session when volume/activity is usually high). Long wicks rejecting the broken level are very good but not always appear, you just need to look to price action coming back to the broken level with little momentum / volume.
Also in the example of yesterday what gave me extremly confidence was the fact that the low volume test was actually another VSA indicator called 'no supply'.
A no supply bar is a narrow spread or body down bar (really narrow) closing off the lows (usually with little wicks) with volume lower than the previous two bars (if volume is lower than more previous bars is better), this indicator shoulda appear after a sign of strenght (the break to the upside with nice volume was the sign of strenght in the market at that point).
I hope my answer is clear. If you have any other question, please shoot :-)
Preservation of capital and home runs.