I am following a service that shows the "percentage gainers" in real time, each morn for NASDAQ or NYSE. The data UNFORTUNATELY FOR ME, is based on yesterdays closing price, not the opening price. I waste time looking for "gainers" from the open (not the close). Does anyone know a data provider for such info? Oh yes, current data provider said they have to calculate from previous days close rather than opening price (which I don't believe is really required if they would just rewrite their software)