Checking the gold price on several websites at once often produces several answers. None of them need be wrong, because they are measuring slightly different things.
There is no single official spot price
Gold trades over the counter between banks and dealers worldwide as well as on futures exchanges. No central exchange records every transaction in one place.
Data providers construct a spot price by aggregating quotes from contributing institutions, and different providers use different contributor sets.
Small differences in that composition produce small differences in the resulting number, continuously and without anyone being in error.
Bid, ask and mid are different numbers
Every quote has a bid at which a dealer will buy and an ask at which it will sell. A site may display either, or the midpoint between them.
Comparing one site's bid against another's ask makes the gap look larger than the underlying disagreement actually is.
Reputable sources state which they show, and checking that label resolves a good share of apparent discrepancies immediately.
Update frequency varies
Some feeds refresh continuously while others update on a delay or only at intervals, particularly on free pages where live data carries a licensing cost.
During a fast-moving session a delayed feed can differ from a live one by an amount that looks like disagreement rather than lag.
Refreshing two pages at the same instant is not a controlled comparison unless both are known to be live.
Daily closes use different cutoffs
Because trading runs nearly around the clock, defining a daily close requires choosing a time, and providers choose different ones.
A chart built on a New York cutoff will show different daily highs, lows and closes from one built on a London or a Sydney convention.
Over a single day this is minor, but across a chart it shifts the shape of candles and can change where a pattern appears to sit.
Currency and unit conventions add more variance
Prices quoted in currencies other than dollars embed an exchange rate, and providers may apply that rate at different times of day.
Units matter too, since some markets quote per gram or per tola rather than per troy ounce, and conversion rounding introduces small differences.
Establishing feed, side, timing and unit before comparing two numbers is what turns a puzzling discrepancy into an explainable one.