How Does an "Edge" Dissapear?

I’ve read here and there where people have said that over time, any edge that someone discovers will disappear.

Now some of these people are paranoid types that think that your method of trading gets taken advantage of or sold by your broker once they identify you as a winning trader. That type of conspiracy theory nonsense is not what I’m talking about.

I’m referring to the idea that “the market” somehow reacts to what you are doing in a way that eliminates your system’s advantage.

Is this true?

Also, if your participation in the market generates the conditions to which the market reacts in order to erase your edge, couldn’t you overcome such an obstacle simply by randomly taking a day/week/month off and not applying your edge? It would seem that such moves would make it impossible for the market to adapt to your edge if you are removing it from the mix entirely. In fact, if your edge was significant enough to be reacted to, the absence of it being applied would in and of itself be a source of confusion to market dynamics, wouldn’t it?

Think of it like the Hawaiian Islands. They are sitting in the middle of the ocean taking up space, if they all of a sudden disappeared leaving a gaping hole in the ocean, the surrounding water would fill that hole within seconds and cause chaos because its absence was unexpected. If the islands then immediately reappeared out of nowhere 5 days later and quickly displaced the water, this too would create a distinct disturbance.

Scaled down to the original idea of an “edge” being present in the market, if it was there and being adapted to and then all of a sudden it wasn’t there, this would create a local disturbance for whoever was adapting to the edge. I’m guessing that if the market has a natural pattern of finding and eliminating someone’s edge, it doesn’t do so as quickly as water filling a gaping hole in the ocean. It would take more time.

So when an edge is present, the market goes to work isolating and eliminating it. But if the stimulus was removed prior to this being achieved, the LACK of the edge to which the market was applying “pressure” could cause the market to react (on some small scale) in a chaotic fashion to the stimulus being removed.

Of course, one could argue that the actual disappearing and reappearing of the edge in the market then could be considered ITSELF a pattern - unless such disturbances were injected at random and extended for a random period of time. Thus you could stop working your edge for one day every month and then every three or four months extend that to three or four or five days instead of one.

Am I thinking about this correctly? Is there a flaw in the logic? Or is the idea that anyone’s edge gets quickly negated just more baseless negative thinking which can be better explained by individual trader’s discipline breaking down over time with the negative results being falsely attributed to the “edge” being neutralized?

Edges go away for two primary reasons. One is that enough traders (read volume) identifies the pattern being traded and eventually causes it to change in some fashion. For example, if too many folks anticipate a trend following a break-out they will jump in on the break, but then leave a lack of follow-on traders to extend the trend, so the break-out fails.

The other reason is that the market goes through a kind of structural change. This is often driven by some fundamental factor. For example, mean-reversion types of strategies worked quite well in the middle 2000s, but got blown apart when volatility expanded during the financial crisis.

I think market manipulation is more logic than your theory. How can your broker know wich TF you are watching or the indicator you are usin, or the lines you are drawing, they must hack in you computer. Maybe they can track your winning trades and try to relate it to certain patterns (technical, fundamental and so on) but they might not be same as you are watching, they can make a copy trade but the copier would have some seconds of difference and it is no more and edge for the copier. Why would a broker sell a strategy if they can much more manipulating spreads and prices and who would buy these strategies? I think it would be more profitable if after they identified you as a succesful trader copy you and trade with their own account with the information you provide.

This is the type of thing that I would worry about as well. Not just from a broker though…from anyone. People like to go on and on about how the FX market is so big and so liquid…but the fact of the matter is that there is only so much liquidity available at any particular instant of time. If a broker (or anyone else) knew your exact strategy, then you might all be able to get in at the same time, but they might set their T/P 1 pip lower than you and thus eat up all the liquidity one second or so before you look to exit.

Maybe I’m just being paranoid though.

Just a little. But if they can track down my system, eventhought it is stupidly simple, they deserve a BIG price.

Take a look at this video i’ve found on youtube:

This is why, as a trader, you are always learning, always experimenting, and always evolving your edge, and sometimes even using multiple strategies; this way, if one strategy starts failing, the others might keep you in the black overall.