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Nicholas Darvas: Trend Trader

  
  Education
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From a Time Magazine article in 1959:

Darvas places his buy orders for levels that he considers breakout points on the upside. At the same time, he places a stop-loss sell order just below his buy order, so that if the stock does not move straight up after he buys, he will be sold out and his loss cut. “I have no ego in the stock market,” he says. “If I make a mistake I admit it immediately and get out fast.” Darvas thinks his system is the height of conservatism. Says he: “If you could play roulette with the assurance that whenever you bet $100 you could get out for $98 if you lost your bet, wouldn’t you call that good odds?” If he has a big profit in a stock, he puts the stop-loss order just below the level at which a sliding stock should meet support. He bought Universal Controls at 18, sold it at 83 on the way down after it had hit 102. “I never bought a stock at the low or sold one at the high in my life,” says Darvas. “I am satisfied to be along for most of the ride.”

Does your brain accept randomness?

  
  Education
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Everybody knows this feeling and also knows it is a false feeling. You’re in a casino, and the roulette hits red. Then again and again. After three, four maybe five times red in a row, you start to think it’s time for the roulette to hit black. Now, in this simple case, you know that’s not true.

The roulette has no memory and we assume it’s fair. So every round offers an equal chance for red and black (as well as green, 0, the casino takes it all). So the roulette may hit red 20 times in a row. The chance of that happening is very small, but once it has reached 19 times in a row, going from 19 to 20 is just as likely as going from 1 to 2 times red in a row.

Although we know this, our brain doesn’t feel comfortable accepting it. If you had to write down a random sequence of ‘red’ and ‘black’, it would probably not be as random as the roulette. Our brain is a bad randomizer, it wants the sequence to look ‘realistic’ and ‘fair’.

Now look at the markets where things are only a bit different. Unlike the roulette, the market has a memory. That market-memory determines where a feeling of greed pushes the feeling of fear away or vice versa. In between major greed/fear moments, there are up and down days. When we look at several up days in a row, a trader may expect a down day very soon simply because the market went up too many days in a row. This is our brain saying it’s ‘not fair and not realistic’. The brain wants the up and down days to be more alternating to make it ‘more realistic’. What this hypothetical trader is trying to do is go short in strong uptrending market. Not good for your trading account.

Trade Like A Casino, Not A Gambler

  
  Education
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Trade Like a Casino: Find Your Edge, Manage Risk, and Win Like the House

Any quick drive through Las Vegas makes it pretty clear who is rolling in the money – the Casinos! Why do gamblers keep going back despite losing most of the time?  Misplaced hope, fantasies about the big win, promising themselves they will walk away when they are up and still winning, and probably the inability to calculate probabilities. These symptoms may sound familiar to new traders who have lost money in the stock market, especially when we were new to trading and had delusions of grandeur about trading theirway to prosperity quickly and easily.

In gambling there are really only two sides to choose to be on, either you are a gambler or you are the house. The gamblers have the long term odds stacked against them. The more they gamble, the more the odds are that they will inevitably lose. The casino has stacked the odds on their side over the  long haul. The more the gambler keeps gambling, the more the odds shift in favor of the casino operator. The more they gamble the greater the chance the gambler will leave empty-handed.

The book featured in this blog post explains the winning principles of trading by using the casino paradigm. Profitable traders operate like casinos, with the odds in their favor over the long term. They have learned to trade with historically, back-tested trading systems that put the odds on their side. Much like casino operators, they risk small amounts of equity per trade (around 1% – 2% of their accounts), so no one trade can hurt them financially and mentally for that matter.

Most unseasoned traders behave like gamblers, with no real advantage. They plunge large bets on stocks so haphazardly that they just have a 50-50 shot like a roulette wheel – red or black. Many times these traders hurt themselves even worse by buying into the market in a downtrend and shorting into a rally,  believing that they can pick the bottom or top. Some new traders would love to have a 50/50 win ratio, many actually to all the wrong things and are no where near a 50% win rate. (more…)

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