On what basis option premium values increase? How to check the volatility of options?

For instance voltas stock increased from 180 to 200 then how much its premium value may increase ? is there any formula to calculate ?

How to check the volatility of options? is there any shortcut key in ZT to check volatility ?

Check following link for factors affecting option premium pricing

http://tradingqna.com/3044/trade-options-purely-depending-movements-underlying-stock#a3066

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thank u ajay.

You are welcome Sai.