ARTICLE SYNOPSIS ...Creating prices for system testing by D. Howard Phillips Technical trading systems are evaluated using historical, real-time or computer-generated data. All three data sources are useful, but computer-generated data can be the most powerful. In particular, using computer-generated price data that has a known trend percentage allows you to determine the performance of a trading system statistically. These ""trend price streams"" are helpful in evaluating any technical trading system, but are essential to evaluating, adaptive trading systems that learn from experience and change their trading r...