The charts below shows how actual 5-day performance (yellow line) differ from predicted performances by these two methods. The top half is the comparison of Neural Network prediction, bottom half – Cycle Analysis. Green bars mean buy signals, red – sell*.

Three major conclusions for this particular historical period:

1. Cycle Analysis prediction gives signals too early, Neural Network prediction – too late.
2. In average, the prediction by Cycle Analysis showed slightly better accuracy than the one by Neural Network.
3. It seems logical to combine these two methods to improve the accuracy.

* ) The calculations have been performed by an integrated experimental system that combined two applications: Cycle Analysis predictor SMAP-3 and Neural Network predictor NNSTP-2

Charts represent S&P-500 forecast for February 22-26, 2010. The calculations have been performed using Neural Network Stock Trend Predictor NNSTP-2 and Stock Market Predictor SMAP-3 (cycle analysis). A summarized prediction could be a moderate uptrend (1-2%) with flat or downtrend ending. Back-testing fails can be explained by increasing news factor or a possible reversal driven by fundamental changes.