I'm trying to figure out the best time to buy a call option. Is there any way to predict what an option will do. For example if silver is at 12.82 with three months to expiration I buy a call $4 away from the money how much will this option increase if the price of silver increase by $3. Or how much will the price of an option increase if silver jumps $1.50 in one week. I'm trying to figure how options will move in different scenarios. Is there any way to get an idea of what will happen.