To: TraderAlan who wrote (2625 ) 8/10/1999 9:16:00 PM From: Eric P Read Replies (1) | Respond to of 18137
Alan: Wow! I think we'll have to agree to disagree agreeably. Let me try to reply to each of your comments.System trading forces you to visualize a two dimensional view of the markets and to focus on a finite number of specific quirks/movements within the markets to make your money. This takes you out of the market when it doesn't meet the conditions that you set. This implies that a systems trader is restricted to trading a single system. Successful systems traders are also able to develop a variety of systems to match each kind of market. This is no different that a 'discretionary' trader would do. I'm not sure I understand what you mean by a 'two dimensional view', but I certainly know that my main trading systems incorporate many more 'dimensions' than I am mentally capable of handling manually. To give you an example, before I enter a trade my system analyzes the trade through several thousand lines of programming. It looks at the potential trade through every conceivable angle that I would want to analyze prior to making the trade decision, and does so instantly. Assuming I can manually trade in 'three dimensions', then I would have to assume that this systems approach is able to trade in one hundred dimensions, not two.By looking only in the rear view mirror, you deny yourself analysis of the current conditions which may negate the trades that you're considering or force you to the sidelines on perfectly good opportunities that don't fit within the two dimensional scheme. Sounds like the beginning of a new system. If I ever see new opportunities that don't quite fit my existing trade criteria, I'm left with three choices: Modify one of my systems to allow a wider variety of trades, create a new system to focus on this new potential field of opportunity (preferred), or disregard these additional potential trades. It is not necessar to change a successful system that has worked extremely reliably for 11 months simply because it doesn't enter every perceived 'opportunity'. I do agree, however, with your general point that a single system will not fit all markets all the time. Multiple systems are required for this, and their individual performances can and should be monitored separately from one another.If you're a momentum trader, for example, weak markets force you to stand aside when a simple swing strategy will produce a high percentage of profitable trades. See above. Sounds like the start of a swing trading system, but don't 'screw up' your momentum system in the process.The nature of the market dictates that whatever edge you try to program from your backtesting and optimization will disappear immediately as the insiders adjust and eliminate the inefficiency that created the signal that you're acting on. I have not found this to be a problem. Perhaps others have.The most successful traders anticipate the future rather than evaluate the past. Controlled discretion allows you to throw out everything that worked yesterday and execute what's working today. I'm afraid the moment I begin trading with 'what's working today', then it would stop working. My point is, no matter how we choose to trade, no one can ever be certain what will work in the future. I guess as you would say, we all must trade at the 'hard right edge' of the chart. I know that there are extremely successful systems traders, just as there are extremely successful 'discretionary' traders, technical-based traders and fundamental-based traders. All successful traders have found their own niche that works for them . However, I would never presume to suggest that there was any best ways to daytrade. We must all work to find the method that makes each of us the most successful trader possible. I merely point out that systems trading is among the options to consider. In fact, quite a few of the traders interviewed in "Market Wizards" were systems-based, and... quite a few were not. To each his own. Good luck, -Eric P.S. We should have plenty to 'argue' about at the Expo! <ggg>