your concept of volume is wrong
1) low volume on up bars.
This is wrong, this is consolidation, not up bars, just because its green does not mean its an up bar, consolidation should be on low volume. An UPBAR means its making a new high not if it closes green.
2) high volume , low spread, closes near low
wrong analysis, that means nothing when that red bar pops up after a large bar move 3 bars ago., it just means its testing the breakout high.
3) hammer I'd short here
wrong once again, if you haven't noticed its a higher high , you'd short here? lol.
Doesn't even look like a shorting hammer in the first place, the tail should be on top not on the botto, that is a long hammer.
4) where did I go wrong
who knows what you are doing
you aren't trading on volume , nobody knows what you are doing.