NeuPortal | Gold - core 4,081-4,209, and where the band failsGold / U.S. DollarFOREXCOM:XAUUSDneuportalMeasured, not assumed. The band is the interquartile range of how gold has actually moved over this window, read from 3,001 overlapping windows of the chart's own history. Median 4,142 Core 50% 4,081 - 4,209 (3.1% of spot) Wide 80% 3,999 - 4,262 (6.4%) NO DIRECTIONAL LEAN. The trend gate is open (ADX 35), so the market is trending by that measure - but the net momentum signals cancel out, so the median sits near spot. Strong trend, no clean direction. This is a statement about how far, not which way. WHERE THIS BAND FAILS - AND WE SAY SO Out-of-sample, fitted on older history and tested on newer: core coverage 27% against a 50% target, wide 55% against 80%. Both well below target, which means on gold at this horizon the band runs TOO NARROW - price left it more often than it should. That is a real weakness, printed on the chart, not hidden. A tool that only ever looks good is a tool that isn't being scored. Why: skew -0.67 and excess kurtosis 3.00. Gold's fat tails and left skew are exactly what a narrow empirical band underestimates, and the coverage numbers catch it. 125 independent windows, not 3,001 - overlapping windows share most of their bars, and the smaller number is the honest sample size. The drawn path is an illustration of how price might travel, not a claim about the route. What is described is where it lands, and that is the band. Educational content - not financial advice.