Day after day I am watching two screens on TDAmeritrade system. One a real-time ticker and chart and the other a Level II screen (NASDAQ???) Very often these two do not agree. Are the specialists constantly doing trades outside the bid/ask or is TDAmeritrade so slow and not giving accurate info. I am not talking about blips but for many minutes they are showing two completely different prices. If it were slow servers they would catch up within seconds wouldn't they? Either way it is WAY FU'd. As if there were multiple markets in parallel universes. Please make suggetions on a better trading system for me or explain why such a discrepancy.