In a follow up to the prior post on uptrends, Thomas Bulkowski has some useful statistics. Over the past 10 years, greater than 7 up weeks sequentially has a 2% probability of continuing; greater than 6 up weeks, a 5% probability; greater than 5 up weeks, an 8% probability; greater than 4 up weeks, a 16% probability.
From the Patternsite website.