What ATR multiple should I use on gold?

Most gold traders work between 1.0 and 2.0 ATR. Below 1.0 the stop sits inside ordinary session noise.

Should ATR be read in dollars or pips on XAUUSD?

In dollars per ounce. Reading an ATR of 18.0 as pips understates the stop tenfold under the common 0.10 pip convention.

Does an ATR stop replace structure?

No. Place the stop beyond the level that invalidates the idea, then use ATR to check the distance is not inside the noise.

How does an ATR stop change my position size?

Directly. Cash risk stays fixed while the stop widens with volatility, so lots must fall.

Gold ATR Stop Calculator for XAUUSD Volatility

Stop distance equals the average true range of your timeframe multiplied by your chosen multiple, placed below entry on a long and above entry on a short.

Because gold can travel twenty five to forty dollars in a session, a fixed pip stop is either inside the noise or wastefully wide; the ATR multiple keeps it proportional.