Implied Volatility, % Change in the Option Chain

Question

The following is the Options Chain of CRM (Salesforce) for March 19, 2021.

A few questions from the chart:

1. What does the % Change mean in this chart?
2. What does the Volume mean?
3. At the $300 strike, I see 4899 Open Internet. Does that mean 4899 options have been sold by traders who are expecting the price to reach at $300?
4. Is there any indication from the chart that the IV will not go down significantly for CRM before March 19, 2021 from the current level of 39%?
5. What is the right option strategy for any stock symbol to play against the IV but only against the price?
6. Take this scenario. A trader buy at strike at $115 at IV 71.95%. A month from now, IV drops to 25% but the price goes up to $240. Does that make a profit or a loss?
7. From the Chart what is considered as a low IV? Is 40$ low IV?

Answer 1

What does the % Change mean in this chart?

Percent change from close to close

What does the Volume mean?

Number of contracts traded

At the $300 strike, I see 4899 Open Internet. Does that mean 4899 options have been sold by traders who are expecting the price to reach at $300?

Buyers expect calls to rise not sellers

Is there any indication from the chart that the IV will not go down significantly for CRM before March 19, 2021 from the current level of 39%?

Option chains do not predict future IV

What is the right option strategy for any stock symbol to play against the IV but only against the price?

Unclear question.

Take this scenario. A trader buy at strike at $115 at IV 71.95%. A month from now, IV drops to 25% but the price goes up to $240. Does that make a profit or a loss?

Learn to use an option pricing model.

From the Chart what is considered as a low IV? Is 40$ low IV?

Go to IVolatility and look at a one year chart of CRM's IV. From that, determine what you think high and low IV are for CRM.