The battle: an efficient market and a TS with a positive maturity expectation. Who will win?

 
By observing the price you see the result of information which has no effect on the market. It has already been accounted for, worked out, discarded and forgotten (and immediately, by those to whom it is available).
The market will repeat its past behaviour (this is a consequence of the TA postulate) in the future, so can we make predictions based on analysis of past price behaviour?
Past data sets and their corresponding price changes cannot be seen as future possibilities. ( because they will NOT repeat in the future (there is random noise in them )).

The market will never be what it is now=> the parameters and strategies/tactics that work on history should not work in the future, when the market has changed.

How is it possible to simultaneously accept the market efficiency theory and create profitable MTS?

Let us start with the main conclusion of this theory, which states that in markets with strong efficiency it is impossible (or nearly impossible) using publicly available information (which are primarily past quotes and primitive methods of market valuation) to make a profit that is significantly higher than the average rate of return for that market.
To understand why it is possible to create profitable MTS on markets with a strong performance it is necessary to distinguish two things.
1. The distribution for price changes in any period a, from T to T, is a normal distribution with a mean of 0.
(Thus at present time the probability of price moves up and down, for an investor using publicly available information is the same, and when you use primitive technical analysis, you face only random).
2. The distribution of profit-loss, on the basis of which a conclusion about the quality of built MTS.
This distribution is not a normal distribution. It is usually skewed, as losses are usually limited by stops. However, the conclusion is drawn based on the distribution of the mean, which the central limit theorem allows us to do.
So we have a distribution of average profit/loss. And so the mean of this distribution, which is an estimate of the mean of the original distribution, can be a value Significantly greater than zero! This means a conclusion can be drawn that with such a probability (I use the 1% threshold) profit when trading this system will be positive or exceed this or that value. There are a lot of nuances, but if everything is correct from a scientific point of view, the conclusions are very strong.

Applying original methods of market analysis, advanced technologies of portfolio trading, advanced systems of statistical analysis + modern powerful software, the trader has an opportunity to rise from the level of strong efficiency to the average level, which means that for him as an observer, the market is not just a random wandering, he found his island of inefficiency in the stormy ocean of efficiency.
Of course, this island will be destroyed, but the system will give a higher than average profit for this market for some time.
How long will it be able to make that profit.
What do you think? Is it possible to create a strategy based on the search for market inefficiency.
 

The market is inefficient and the distribution of price increments is not normal. Read Peters, you yourself posted a link to him. It is even better to read both books.

But all this does not mean that we can automatically rivet profitable and sustainable systems.

 
Mathemat:

The market is inefficient and the distribution of price increments is not normal.

That's the only reason I still do it - otherwise I'd rather play lotteries....
 
Yeah, it's clear and precise in lotteries, no fat tails or inefficiencies...
 
Mathemat:

The market is inefficient and the distribution of price increments is not normal. Read Peters, you yourself posted a link to him. It is even better to read both books.


But all this does not mean that we can automatically rivet profitable and sustainable systems.



Efficient market theory says otherwise...
 
meta-trader2007 писал (а):

Efficient market theory says otherwise...
It is just a spectacular theory. And it is Samoyedian in essence - if everyone starts to trust it and follow it, the market will stop, and with it the theory will disappear.
 
timbo:
meta-trader2007 wrote (a):

Efficient market theory says otherwise...
It's just a spectacular theory. And it's samoyed in essence - if everyone starts trusting it and following it, the market will stop and the theory will disappear along with it.



The Theory of Relativity is also just a theory, but it works. The same goes for the Efficient Market Theory - it works, and 95% of depo losses confirm this. If it didn't work - all or practically all would earn.
The theory of efficient market says: the market is a sensitive and precise converter of information, which reacts correctly to the appearance of new information and produces the correct prices of shares and bonds.
The market is a parasitic system that lives off financial inflows from outside. In order to keep the flow of money moving in and out of the market, the market must change constantly so that no one gains for a long time. I.e., the market should be effective in the area of recognizing the profitable trading systems and change in time so that these TS become unprofitable.

The essence of the market is a constant change that does not give profit, only brings losses.
 

DC wins

 

Most are not dumping at all because the efficient market hypothesis is correct. Once the market was in a situation where most (money-wise) got it "right", the market would immediately react to such an outrage by a sharp reversal of prices, restoring liquidity in the right direction (and at the same time knocking down a bunch of stops, freeing up the right assets to increase their liquidity). Moments of market liquidity disruption are well known - the 1987 crisis, for example. Catastrophe is actually the main liquidity smoothing mechanism.

 
meta-trader2007 писал (а): Рынок - это паразитирующая система, живущая за счёт финансовых поступлений из вне. А чтобы поток денег не ослабевал и не был направлен из рынка, рынок должен быть постоянно изменятся так чтобы никто не мог с течении длительного времени выигрывать. Т.е. рынок должен быть эффективным в сфере распознавания прибыльных торговых систем и вовремя изменяться чтобы эти ТС стали убыточны.

Let's not get offended, but for the second time in one day I'll tell you that the bolded text in your text is nonsense. The financial markets are more than just small-time gambling within a kitchen DC.

A steady stream of money from the market is, for example, pension payments in many developed countries around the world, it's insurance payments, it's pay raises for millions of small investors and much more.

 
timbo:
meta-trader2007 wrote (a): The market is a parasitic system that lives off financial inflows from outside. And for the flow of money to keep flowing in and out of the market, the market must be constantly changing so that no one can win for a long time. That is, the market must be efficient in recognising profitable trading systems and change in time so that these systems become unprofitable.

Let's not get offended, but for the second time in one day I'll tell you that the bolded in your text is nonsense. Financial markets are more than just small-time gambling within a kitchen DC.

A steady stream of money from the market is, for example, pension payments in many developed countries around the world, it's insurance payments, it's pay raises for millions of small investors and much more.



The market can only function well if the inflow of funds exceeds the outflow, otherwise it will collapse and end.
The market is a parasite in essence - it does not produce anything, but only redistributes and feeds itself (gets money to survive and develop) by taking away some of the money that passes through it.
Reason: