Retail trading platforms typically offer equity charts but only instantaneous quotes on options. It seems like even a few minutes of historical data would be useful when entering an order. Are charts not offered because traders don't use them, or do options traders typically subscribe to third party data sources for charts?
I'm aware of charts as devices to explain the value of an option contract with respect to the underlying. I'm interested in learning about why charts that show the historic price of a specific contract over time seem hard to find.