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I am calculating a rolling historical volatility for a series of commodity
returns, using the following formula =STDEV(D6:D35)*SQRT(252) I want to be able to type in the # of days back to go (e.g. in the example above, it is a 30-day rolling stdev) in the cell above the top value. That is, I want to be able to type "50" into the cell and have the formula update to STDEV(D6:D55)*SQRT(252) automatically. |
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