I am new to Forex trading. I started with a free practice account to test some strategies. Is there any free website/broker which will offer TA screen based on value of particular indicator. For example, I want to get an alert when ADX on 15 min chart for AUD/USD hits 20. Since the default for ADX is 14 periods, it would be great if I have the option to specify other periods too, say 20 periods. Thanks in advance.