Hi,
I can see that you are looking for an indicator rather than a strategy. I have seen those double bottom/top indicators and strategies, they may create good and profitable configurations.
In my proposal, i would like to offer you to build a strategy with an indicator or two (may be double top/bottom) with 1 to 1.5 years of profitable back-testing for one currency pair (i.e. EURUSD). For this I would build several samples to show you and you select the strategy (back-testing) which better fits your needs in terms of max-drawdown, avg win/avg loss, net profit and overall performance.
If you have any other requirements besides the ones you mention, just let me know and we can discuss them further.
Regards,
John.