I want to setup an data vending service for stock forex and comodities for that i? -

need an downloader so that i can offer that downloader to my clients which then can download the quotos from my server can u suggest me anyone who can make an custom downloader for me Have you paid for a data feed from each of the exchanges? Have you paid for a license to redistribute this data? If not, then nobody can help you. You don t own the quotes, even if you ve captured them and have them on your server. They remain the property of the relevant exchange who will stop you from selling them.