where to find long term option charts

[qwert]

i have a interactive brokers account, but it seems the charts only go back a month. do i need to subscribe to something to get long er term charts? does ninja trader have option charts?

otherwise is there some other place to get option charts past 1 month. and where is the cheapest place to get historical option prices?

 

[just21]

ask for more data, option charts go back more than a month.