RSI — every instrumentRSI (momentum) is computed for every instrument — it needs only price.
OBV — equities & futuresOBV (On-Balance-Volume) needs real traded volume, so it is available directly for the equities & futures (NVDA · TSLA · QQQ · IWM · SK Hynix · 10Y ZN · 30Y ZB · gold · oil).
SPX & NAS100 — volume proxySPX & NAS100 are cash indices with no native volume, so their OBV is built from a volume proxy (SPX ← SPY or ES=F, NAS100 ← QQQ or NQ=F — pick with the SPX/NAS OBV proxy control).
No volume, no proxy → N/AThe remaining vol indices (VIX · VVIX · SKEW), FX (USDJPY · USDCNY · USDCHF · USDKRW · DXY) and Asian cash indices (HSI · N225) have no traded volume and no proxy, so their OBV cells read N/A — no volume (we show the honest gap rather than fabricate a signal). RSI still works on all of them.