So you've got data since 1990. But what about data from before that period. How does one get hold of that data ? From where ? You might be interested to know more of Indian markets historical price movements, or do calculations or technical studies on longer periods. Well, I have both good news & bad news. Bad news first - Nifty data is not available before 1990, simply because it didnt exist. Infact it didnt exist even in 1990, thats why one doesnt see Open,High,Low values for Nifty, just the Close values. Those close values were infact computed backwards from the closing values of the components of the index as on the day of the formation of the index (3rd November 1995).
But the good news is that data for Sensex is available, infact for quite a long period, from 1979 onwards. Leave me a comment with your email/ph if you need it.