Why Delistings Are Dangerous
When an exchange delists a perpetual futures contract, it stops trading on that instrument — typically after a short wind-down period. If you have an open arbitrage position (long on one exchange, short on another) and one side gets delisted, you're left with an unhedged position exposed to full price risk. The delisted leg gets force-closed at an unfavorable settlement price, while the other leg remains open and moves against you.
Delistings often target low-liquidity coins where spreads are thin — exactly the pairs many arbitrage setups use. The danger compounds because liquidity on the delisted instrument dries up in the days before removal, making it progressively harder and more expensive to close positions manually. Early detection is critical: the sooner you know, the more time you have to close at a fair price.
How Detection Works
Layer 1 — Exchange Announcements: Arbitron monitors official announcement APIs from Binance, Bybit, Bitget, and OKX every 30 minutes. When an exchange publishes a delisting notice (days or even weeks before the actual removal), the system extracts affected symbols and triggers an alert. This is the earliest possible warning — often 3-14 days before the instrument is actually removed.
Layer 2 — Instrument Monitoring: Every 5 minutes, the system fetches the full instrument list from all 18 supported exchanges. Only actively tradeable instruments are included in each snapshot. If an instrument disappears from the active list — whether due to a status change, suspension, or removal — the system immediately detects it. This catches delistings on exchanges that don't have public announcement APIs.
Layer 3 — Symbol Disappearance: If a symbol that was present in the previous instrument snapshot is completely gone from the current one, the system treats it as an emergency delist event. This is the last line of defense — it means the instrument has already been removed. While not ideal, it still ensures that affected trading cards are immediately stopped rather than continuing to trade on a dead instrument.
Timelines vary by exchange and reason. Most planned crypto delisting announcements land 3-14 days before the contract is pulled — Binance typically gives 24-72 hours on its delisting list, Bybit 5-7 days, OKX and Bitget often a full week, while smaller venues sometimes warn only hours ahead. Arbitron polls the public announcement APIs every 60 seconds, snapshots the full instrument list every 5 minutes to catch silent removals, and reacts within one tick when a symbol simply disappears from the live feed. Root causes cluster into four patterns: regulatory delisting (SEC pressure, MiCA compliance, sanctions exposure), token-issuer requests after a rebrand or chain migration, low-volume cleanup (exchanges routinely cull pairs trading under $1-2M daily), and security incidents — exploits, depeg events, or wallet freezes. Knowing the cause tells you whether to expect an orderly wind-down or an immediate halt.
What Happens When a Delist Is Detected
When any detection layer triggers, a delist event is published internally. The web service receives it and checks all active trading cards across all users. Any card that uses the affected symbol on the affected exchange — whether it's in Open or Running state — is immediately set to Error status with a clear reason like "Instrument delisting on Bybit (Announcement)". This prevents the card from opening new positions or continuing to trade.
A Telegram notification is sent to every affected user, including the exchange name, symbol, detection source, delist date (if known from the announcement), and a list of affected cards. The message clearly states that action is required: you need to manually close any open positions on the affected pair before the delist deadline. The card remains in Error state until you review the situation and decide what to do.
Covered Exchanges
Announcement monitoring (Layer 1) is available for Binance, Bybit, Bitget, and OKX — the four major exchanges that provide public delist data. Other exchanges rely on Layers 2 and 3 for delist detection.
Instrument monitoring and disappearance detection (Layers 2 and 3) covers all 18 supported exchanges: Binance, Bybit, OKX, Bitget, Gate.io, MEXC, BingX, KuCoin, HTX, Phemex, BloFin, Hyperliquid, BitMart, Poloniex, Weex, CoinEx, Aster, and Lighter. Every instrument refresh cycle automatically compares the current state against the previous snapshot — no symbol can disappear without the system noticing.
What You Should Do
When you receive a delist notification, check the affected trading card on your Dashboard — it will show Error status with the reason. If you have an open position on this pair, go to the exchange directly and close both legs manually. Do not wait until the last day: liquidity drops sharply as the delist date approaches, and slippage can be significant.
After closing your positions on the exchange, use the Close action on the affected card to return it to Closed status. Once closed, the card remains in your dashboard and preserves the full trade history — cards are never deleted. Note that once a card has any trade history, its symbol and exchange pair are permanently locked and cannot be changed. If you want to trade a different pair going forward, simply create a new card. Keep Telegram notifications enabled — they are the fastest way to receive delist alerts. The system catches most delistings days in advance, giving you ample time to act, but always treat delist warnings as urgent and time-sensitive.
If your card holds a position on a soon-to-be-delisted pair, treat the announcement as a hard deadline and act while order books are still deep. The practical checklist: (1) close the position 24-48 hours before the stated cutoff — liquidity evaporates fast as market makers withdraw, and spreads on how to close delisted futures position widen 5-10x in the final hours; (2) watch the funding rate, which often spikes to ±1-2% per 8h as MMs hedge their exit; (3) cancel any pending limit orders and disable auto-reopen on the card; (4) withdraw collateral from the affected sub-account if the exchange settles the contract in a non-stable token. For any crypto delisting trade still open at the cutoff, exchanges force-settle at the mark price index — usually fair, but not always favorable.