Noise Scales With Granularity

The noise-to-signal ratio

The finer the timeframe, the more of the movement is random noise. A 1-minute candle is mostly micro-order-flow churn; a weekly candle is mostly information. Statistically, noise scales with the square root of time — a stock with 2% daily noise has ~10% weekly noise, not 14%: longer periods average randomness out.

Practical consequence

The same pattern "works" differently per timeframe: a 5-minute support bounce might hold 55% of the time; a weekly support hold is far more meaningful because real positioning sits at those levels. This is why day trading demands tighter risk and faster reactions for the same nominal edge.

Choose by availability, not excitement

Pick your primary timeframe by how often you can actually check the market and how long you can hold a position without losing sleep. A person who works 9–5 has no business primary-trading 5-minute charts. The best timeframe is the one that fits your life — the market pays for discipline, not screen time.

Sources

• Support & Resistance TimeframesInvestopedia
• Noise scaling (random walk)Standard market statistics