Let's put it in one sentence: Signal processing methods don't work for trading and as soon as you dive deep into it you will get to know it - so save yourself some time and start doing more useful work
This is of course something which people like Ehlers and all the other "experts" would never admit because this is their foundation to run a very profitable business by selling a lot of great looking stuff to the sheeples out there.
99 who are so comfortable or lack the intellectual skills that they simply buy the indicator packages and all possible signal services based on them. And then they loose and buy another one and this is how it goes.
Ask yourself why somebody would sell you anythings which is really useful for making profits in real trading.
All the examples given by Elhers in his books and classes are being constructed and limited to a certain period of time where it looks like his methods work. Everything looks nice, smooth, there is a solid math behind - enough reasons for most people to buy into it. As soon as they start trying out the methods they soon realize that they don't work systematically.
The good news is that are methods which work but nobody would tell you about those and for sure you will not find a book about a working method: you have to really dig into the mud and find out
A little hint here: only the pure and unfiltered price action is what matters. Anything added on top to remove noise and to smooth things is just a confession that you don't know what is going on. As soon as price action no longer fits into your model you simply declare it as a noise and filter it out - how pathetic is that... But this is exactly what signal processing when applied to trading is and this is why you will end up losing your money. Remember: there is no such a thing like noise in real trading.
Learning is good but learning the wrong thing can cause real damage, especially when it comes to trading
