historical volatility

How to make a historical volatility indicator for a 5-minute chart? ps. on the daily chart it plots the correct value, but when it changes to 5 minutes the volatility is wrong. thx

Do any one knows a good website for historic datas of top gainers and losers in indian market.

Hi All, I need help in coding the Historical Annual Volatility and the Intraday Annual Volatility in AmiBroker. The formula for the same is mentioned below, Historical Annual Volatility : HAV Returns = Log( Current Close / Previous Close); HAV Current Daily Volatility = SQRT(( 0.94 * (HAV...