All the individually strong bars have an equal and opposite mirror image for the potentially weak bars.
Bag holding is the strongest individual bar.......End of a rising market is the mirror image weakest bar
Then all of the different potentially strong climactic bars......have an equal and opposite weak bar
Then a shakeout (sign of strength)........and an upthrust (sign of weakness)
and a test/no supply bar (SOS) ...........no demand (SOW)
Test bars work best when the market is being supported, and is in an uptrend.
There will be test bars in a downtrend, but they either won't work very well or will fail outright (and a failed test is considered a sign of weakness in itself).