However it must be noted that while historical volatility can be indicative of future volatility, it can also differ greatly from future volatility, depending on what was driving the price changes during the past period. Major expected news items are more important drivers of big moves in the stock price in the near future.
Morningstar publishes historical volatility data for individual stocks and indices. For example if you need to check what is the statistical volatility of IBM, key-in the ticker and look for the highlighted area below. It shows volatility data for 1 month to 3 years.
Now with this you can use the 1 year volatility data to calculate the probability of a stock reaching a particular price using the following calculator: Stock Price Probability Calculator