Backtest it for yourself and see how well it works out.
It's not illegal to smoke underage, just to purchase cigarettes and other tobacco products.
Indicators give false signals because they are lagging in nature. Just don't use them.
Go to http://mirusfutures.com/ and use their free simulator account with NinjaTrader. Can't go wrong.
It'd be easier to help if you gave us more information - what are you looking for? Forex, Futures, etc.
If this is true, TA would be invalidated as an approach.
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