Medidata Solutions ( MDSO) is a provider of software-as-a-service (SaaS) based clinical technology solutions. This stock is trading up 3.1% at $20.67 in recent trading. Today's Volume: 336,000 Average Volume: 272,141 Volume % Change: 96% From a technical perspective, MDSO is bouncing off its 200-day moving average today and it has started to move above its 50-day moving average of $20.53 on heavy volume. Traders should continue to look for long biased trades in MDSO as long as it's trending above its 50-day moving average and it closes near its daily highs of $20.72. If we get that action, then look for MDSO to re-test its next significant overhead resistance levels at $22.50 to $24.60 in the very near future. To see more stocks rising on unusual volume, check out the Stocks Rising On Unusual Volume portfolio on Stockpickr. -- Written by Roberto Pedone in Winderemere, Fla.