Trace foreign flow to identify stocks under distribution

Daily foreign flow on IDX is one of the least ambiguous positioning signals — institutional foreign investors report their transactions, and the daily aggregate reads cleanly. The frequent misreading: net foreign sell isn’t automatically bearish. It can be pure distribution (sell with no rotation back), sector rotation (sell A, buy B in another sector), or post-rally profit taking. This workflow separates the three using the Foreign Flow panel under Saham ID.

Panel layout

• Route: /idx/foreign-flow.
• Source: aggregation of /api/idx-live/stock-summary per emiten, filtered to day value > 0 (illiquid stocks excluded).
• Three main sections:
  1. Top 15 net-buy emitens (sorted descending by IDR value).
  2. Top 15 net-sell emitens (sorted descending by absolute IDR value).
  3. Sector aggregation — net IDR per sector + count of gaining vs losing emitens.
• Header: freshness badge (when data was last updated) + manual refetch button.

Daily data, refreshed after IDX close (after 16:00 WIB).

Workflow: separate distribution from rotation

1. Open /idx/foreign-flow.
2. Look at Top 15 net-sell in the left column. Note the 3–5 emitens with the largest net sell (IDR value).
3. Check each emiten’s sector:
   • If the top 3 net-sell emitens are from the same sector (e.g. all banking), this is more likely sector rotation, not specific distribution.
   • If top net-sell spans different sectors (banking + consumer + telco), this is more likely broad risk-off or fund redemption.
4. Switch to the Sector aggregation section. Identify:
   • Large net-sell sector with many gaining emitens = healthy profit taking (foreigners selling some, prices still up).
   • Large net-sell sector with many losing emitens = distribution under selling pressure (foreigners selling + prices falling, downside still ahead).
   • Large net-buy sector showing up alongside = the rotation destination, next watchlist.
5. For the largest net-sell emiten you hold or watch, click through to /idx/<ticker> for detail. Cross-check the multi-day pattern from the foreign flow panel on the detail page (is today an outlier, or part of a weekly trend?).

Three interpretation scenarios

• Specific distribution (most bearish): one emiten’s net sell is much larger than the rest, and its sector has no net-buy counterpart. That stock is being unloaded in a concentrated way. Avoid going long, and consider cutting losses if you’re holding.
• Sector rotation (neutral): net-sell in sector A with magnitude similar to net-buy in sector B. Capital isn’t leaving, just moving. Trade the rotation by following the net-buy sector.
• Broad risk-off (bearish for IDX overall): net-sell spread across many sectors, with minimal net-buy sectors. Foreigners are reducing IDX exposure overall. Defensive bias — cut long exposure, don’t open new setups.

Common pitfalls

• Looking only at IDR value, ignoring % of float. Net sell of Rp 50 billion in a Rp 500 trillion cap stock = noise. Same Rp 50 billion in a Rp 5 trillion cap = significant. Always contextualize against market cap.
• Treating foreign flow as price direction. Foreign net-sell + price up isn’t a contradiction — it means domestic absorption is strong. Domestic accumulation often precedes continuation.
• Skipping sector aggregation. Without sector context, it’s easy to misread distribution as rotation. Sector is the primary filter.
• Trading on a single day. Daily net flow is noisy. Rolling 3–5 day patterns are more reliable. If an emiten shows up in top net-sell three days running, then it’s serious distribution.
• Ignoring the freshness badge. If data hasn’t updated post-close (source delay), you’re reading stale data. Check the timestamp before deciding.
• Using the panel for small-caps outside coverage. The panel filters day value > 0 — emitens that didn’t trade that day are silently excluded. Don’t assume an emiten that doesn’t appear has no flow.