This question is challenging to answer because it depends on things like your investment/trading horizon, the phase (bullish/bearish/neutral) of a market, as well as the individual market itself.
As a general rule, you should look at more than one time period/range and more than one timeframe (daily, weekly, etc.) – starting from the highest timeframe and working your way down. This approach is the most effective way to get a robust sense of a market’s current context and directional bias.
We find that 250 bars (the default) are a good general-purpose starting point for most scenarios, but you should experiment to see what fits each market and your objectives best.
Our reference guide provides valuable tips on preparing for effective automatic wave counts.