RE:high volume today both US and CA...
Looking at the trades on TMX, most were between traders 001 (anonymous). Most trades were small and in 'just off lot' sizes: 15000, 25000, etc. Many trades like this is rapid fashion. To me, I would infer that a pre arranged share trade between 2 buyers was occuring, why else would 2mm shares trade on a penny mining exploration company with no real price change? My 2 cents.