hey jet..... a few indicators have the same theory in mind but slight difference in construction....... often theres a squabble on who invented what, so they give their version their name...... wordens 'tsv' is similiar to 'money flow' and 'bop' is similiar to 'accum/distribu, both of those are in meta..... worden invented something years ago along the money flow line and somehow lost credit for it..... now days many people keep their formulas well guarded..... i'll try to strip off tsv/bop and put'em on a meta m flow/ac/dis chart, its likely they'll be similiar.....h