you have some webs where you can take this information. The problem... usually you need pay for this service. Same examples :
- http://www.xignite.com
- http://fxtrade.oanda.co.uk/trade-forex/api/
- http://forex-automatic-trading-systems.com/developers/api.htm
- http://forexfeed.net/developer/php-forex-data-feed-api
