If you only go long in SPY, for example, when the barometer shows a value greater than 50%, you have made an average of 14.43% per year since 2003 and at the same time avoided the largest drawdowns.
More backtests can be found on my youtube channel (Section: Loro Marktmodelle).
The signals from the market models can be subscribed to or tested for a month: https://lorotrader.com/market-models/