Is there a simple solution to send my trading signals from my trading software ( eSignal EFS, NinjaTrader NTScript, MT4 or whatever popular platforms) to some instant message clients such as Yahoo Messenger, Windows Live Messenger, etc. ( one would be good enough ). Thanks in advance.
In an automated fashion? If you wanted to do them manually, try Trillian. It can send it to AIM, Yahoo, etc at the same time.
In MultiCharts you can create strategies and them have the signals generated from those strategies emailed or SMSed directly to a single user or multiple clients.
In ProTrader / PT multistation, you can share (and sell) your trading signals to other system users, where users can search for and subscribe to "follow" other users in the community/chat screen, by viewing graphs of each others trading performance over time...