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Traders Make Decisions based on Probabilities

Most traders take price swings personally. They feel very proud when they make money and love to talk about their profits. When a trade goes against them they feel like punished children and try to keep their losses secret. You can read traders’ emotions on their faces.

Many traders believe that the aim of a market analyst is to forecast future prices. The amateurs in most fields ask for forecasts, while professionals simply manage information and make decisions based on probabilities. Take medicine, for example. A patient is brought to an emergency room with a knife sticking out of his chest – and the anxious family members have only two questions: “Will he survive?” and “when can he go home?” They ask the doctor for a forecast.

But the doctor is not forecasting – he is taking care of problems as they emerge. His first job is to prevent the patient from dying from shock, and so he gives him pain-killers and starts an intravenous drip to replace lost blood. Then he removes the knife and sutures damaged organs. After that, he has to watch against infection. He monitors the trend of a patient’s health and takes measures to prevent complications. He is managing – not forecasting. When a family begs for a forecast, he may give it to them, but its practical value is low. (more…)

Traders Make Decisions based on Probabilities

Most traders take price swings personally. They feel very proud when they make money and love to talk about their profits. When a trade goes against them they feel like punished children and try to keep their losses secret. You can read traders’ emotions on their faces.

Many traders believe that the aim of a market analyst is to forecast future prices. The amateurs in most fields ask for forecasts, while professionals simply manage information and make decisions based on probabilities. Take medicine, for example. A patient is brought to an emergency room with a knife sticking out of his chest – and the anxious family members have only two questions: “Will he survive?” and “when can he go home?” They ask the doctor for a forecast.

But the doctor is not forecasting – he is taking care of problems as they emerge. His first job is to prevent the patient from dying from shock, and so he gives him pain-killers and starts an intravenous drip to replace lost blood. Then he removes the knife and sutures damaged organs. After that, he has to watch against infection. He monitors the trend of a patient’s health and takes measures to prevent complications. He is managing – not forecasting. When a family begs for a forecast, he may give it to them, but its practical value is low. (more…)

Traders Make Decisions based on Probabilities

Most traders take price swings personally. They feel very proud when they make money and love to talk about their profits. When a trade goes against them they feel like punished children and try to keep their losses secret. You can read traders’ emotions on their faces.

Many traders believe that the aim of a market analyst is to forecast future prices. The amateurs in most fields ask for forecasts, while professionals simply manage information and make decisions based on probabilities. Take medicine, for example. A patient is brought to an emergency room with a knife sticking out of his chest – and the anxious family members have only two questions: “Will he survive?” and “when can he go home?” They ask the doctor for a forecast.

But the doctor is not forecasting – he is taking care of problems as they emerge. His first job is to prevent the patient from dying from shock, and so he gives him pain-killers and starts an intravenous drip to replace lost blood. Then he removes the knife and sutures damaged organs. After that, he has to watch against infection. He monitors the trend of a patient’s health and takes measures to prevent complications. He is managing – not forecasting. When a family begs for a forecast, he may give it to them, but its practical value is low. (more…)

DON’T FIGHT THE MARKET

Fighting the market is not good for two reasons.  First, we lose money.  How much we lose depends on how well we are managing our money and controlling our risk.  Second, fighting the market affects our judgment, and causes us to try to confirm that our judgment is correct. Some very high level market analyst will persist in fighting a trend so that we will eventually be proved to be correct.  They figure that if we persist long enough, no matter how long it takes, we will eventually be right. In some cases the “technical price” level is so far away that by the time the forecast is negated, the inventor following the advice will have lost a large sum and missed a fine opportunity on the other side of the forecast!

By analogy, there is a reason for leaving your car downstream, launching your canoe upstream, and paddling downstream.  It is much easier and eminently more fun to go with the flow and paddle downstream.  We could do the opposite and paddle upstream, eventually we may even get to our destination, but the cost would be substantial.  It would take much more time, more physical and emotional stamina, and we would be constantly fighting the current.  Reaching the goal would not be worth the cost.

From a system trading point of view, it is seen from a different set of constraints. The technical or priced based strategy that gets you into a trade also has a priced based signal that says “the strategy is wrong get out ” or “the strategy is wrong reverse your positions”. The problem with relaying on price to tell you that you’re wrong is that the market does not care. So like the unmoved market analyst that says “it’s only a bear market rally”, at some point money management, risk manage has to come into play, It is a necessary evil.

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