Zones, not lines
Price rarely turns at the exact same tick. Draw a zone that covers the bodies and wicks of the reactions. On gold this is often a few dollars wide on intraday charts.
Fewer levels are better. Start on the daily chart, mark the three or four clearest reactions, then move down a timeframe.
Role reversal
When resistance breaks and price returns to it from above, it often acts as support. This flip is one of the most reliable ideas in technical analysis because it combines a level with a change of control.