Random buying and selling, and day trading

Trading is no different than any other serious endeavor in life - preparation is key. Plan your work and work your plan. Nothing 'random' about that. It would be incredibly naive to think that a random approach (like a coin-flip for entry bias, and an equally random timing mechanism for position entry and exit) would yield a consistently positive result. It would work if the market stayed relatively static in terms of net change and rangebound in it's 'random' walk - but it does not. And that is the problem for you.
 
Quote from bone:

Trading is no different than any other serious endeavor in life - preparation is key. Plan your work and work your plan. Nothing 'random' about that. It would be incredibly naive to think that a random approach (like a coin-flip for entry bias, and an equally random timing mechanism for position entry and exit) would yield a consistently positive result. It would work if the market stayed relatively static in terms of net change and rangebound in it's 'random' walk - but it does not. And that is the problem for you.

My read on OP's question was that he was contending that random entries/exits would yield a roughly 50/50 (breakeven) result in the long run (minus commission and minor slippage). I don't think a "consistently positive result" was even considered as a possibility.

What I'm contending is that a random strategy will yield a consistently negative result.
 
Spearhead, thank for your comments, you seem to understand what I'm asking about. I'm not advocating using this strategy to make money, just to understand how and why prices move.

The question remains, however. Why is it a negative result over the long run if you play my proposed game? The reason in a casino is obvious. For example, if you play roulette, and always bet black, you would break even in the long run, except for the 0 and 00 spots, that slightly skew the odds in the house's favor.

What causes the slightly negative skew in market (assuming there is one), if you play randomly?

Let's say that banks and other players really do control prices, so that the price is not *entirely* random. Fine, but even then, if I enter and exit randomly, one might argue that I will on average both gain and lose equally from the action of the price, since it can be manipulated either up or down, and I have no knowledge of which state I'm in at the moment I randomly buy or sell.

Anyway, it's still not clear to me why the strategy would result in anything worse than the long term movement, even though that may well be true in reality.
 
folks seem to be confused.

just because something isn't random, doesn't mean you can figure it out, or gain an 'edge'.

especially when others playing in the same mudpile are trying to do the same thing.

1.1251718608.puigs-in-mud.jpg
 
Quote from NoDoji:

Direct me to any 3- or 5-minute chart of a stock with decent volume (1,000,000 shares a day or more) and I will show you textbook price action patterns that demonstrate the intraday patterns are no more random than 90 days of price bars on a daily chart.


And imagine trading this, while having targets identified – that price will hit

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Market is most certainly uncertain… market is not random


Truth be known, there is a lot of deliberate effort exerted in the market – but identifying it, for some, is near impossible…

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OP,

Price does not move randomly - that, unfortunately, is your first incorrect presumption

And for the record - don't take what I posted as meaning I know the out come of my next trade - I don't, and never will know the outcome(uncertain - yes... random - not even close)


RN
 
Quote from planttime:

Hi all. This is my first post.

There seems to be a fair amount of evidence that intraday stock prices move (mostly) randomly on short time scales.

My question then is what if you were a day trader and you randomly picked a buy point, and then a sell point every day, for a given stock. What would your long term average be (ignoring commissions) after many years?

If stock prices move randomly, it would seem that you would win and lose about the same amount on average, except for the long term trend in the stock price. Therefore, it seems like this strategy would simply follow the long term price movement of the stock.

However, I also read that most day traders LOSE money. Does that mean that most day traders do WORSE than random? That is, they are actually surprisingly skilled at doing poorly. If this is true, why? Seems like it can't just be the commissions, which I ignored above.

Would be curious to hear your thoughts on any of the above.

Thanks.


Most people are indeed "surprisingly skilled at doing poorly" in trading. This is because most people's instincts tell them to do the opposite of what is required. Most people have the desire to go against a strong trend and most have a hard time cutting losses, but an easy time cutting profits.
 
Quote from ElecEquity:

Prices don't move randomly.

They do. The market is inherently irrational and random, it doesn't even have to react to "good news" by moving up, and vice versa.

The traders who trade price action or TA usually die by a thousand cuts from their stop losses (which includes commissions and slippage), because markets frequently generate false breakouts, reversals and failed patterns. The ones who choose to martingale or down average into losers usually net small wins, but they always get wiped out by a huge loss in the end.

Traders who have no real edge will never make any money in the long run.
 
Quote from ElecEquity:

How can price move randomly unless major buyers and sellers operate at random?

They don't operate at random, but there are MANY major buyers and sellers out there, its not possible to know if there are more buyers than sellers in the market, until after the fact. Most traders rely on past information to predict future developments, that is why most fail.
 
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