Random article: Forex Backtesting Trading Strategies: Manual Backtesting
By doing backtesting manually and studying price movement bar by bar, a trader stores price movement data in his/her brain one after another. When the brains receive enough similar data over a period of time, it automatically sorts them out and tags certain data with certain similarities while discarding the rest. Thus, over time, when a new data enters what a trader sees in his/her chart, if it has a close similarities as the tagged ones, the brain kicks up. As the result, a mentioned trader feels he/she recognized the price movement and its possibilities. Thus the trader has built his/her trader's instinct.