SanDisk ( SNDK) designs, develops and manufactures data storage solutions in a range of form factors using its flash memory, controller and firmware technologies. This stock is trading up 2.3% at $36.75 in recent trading. Today's Volume: 9.4 million Average Volume: 6.5 million Volume % Change: 105% >>6 Tech Stocks That Rate Better Than Apple From a technical perspective, SNDK is bouncing hard to the upside off of extremely oversold levels today with heavy volume. The stock's current relative strength index (RSI) reading is 19.25, which is well below the average oversold reading of 30. Shares of SNDK gapped down big last Friday from over $40 to a low of $34.34 with heavy volume. The stock has now started to flirt with moving back above Friday's high of $36.76. Traders should only consider long-biased trades in SNDK if it's trending above $36.76 with strong upside volume flows. I would consider upside volume that's near or well above 6,513,360 shares as strong. If we get that action, then look for SNDK to fill some of that recent gap-down zone.