(Telecompaper) Based on billions of online and in-store transactions analysed by the IBM Digital Analytics Benchmark and IBM Quarterly Retail Forecast, IBM predicts another strong shopping season with online sales projected to increase 15 percent over the five-day period between Thanksgiving and Cyber Monday. The biggest increase in online sales is expected on Cyber Monday, predicted to grew 15.8 percent, followed closely by Thanksgiving with a projected increase of 15.6 percent. Still widely considered the busiest day for in-store shopping, Black Friday online sales are expected to grew 13 percent.