How the tape works

Observed prices and rates, one calculation, and a shared six-hour cache. No prediction.

Three steps

  1. 01 ReadGoldprice supplies gold. Exchangerate supplies the three FX lines.
  2. 02 AlignEach chart keeps one market and one selected calendar window.
  3. 03 CacheVisitors share a six-hour edge response instead of triggering a fresh upstream read.

The movement number

The percentage compares the first available observation inside the selected window with the latest observation. It does not fill weekends or missing dates.

change % = ((latest − first) ÷ first) × 100

Sources and units

Gold / USD

US dollars per troy ounce. Current and historical observations come from Goldprice.

Goldprice ↗

USD / IDR

Indonesian rupiah for one US dollar. Current and historical observations come from Exchangerate.

Exchangerate ↗

USD / JPY

Japanese yen for one US dollar. Current and historical observations come from Exchangerate.

Exchangerate ↗

EUR / USD

US dollars for one euro. Dino inverts the EUR rate supplied against the USD base.

Exchangerate ↗

Limits