Twelve arbitrage events were logged on October 13, 2026, ten of them in the feed. The headline was ARC at 16.16% between Bybit and KuCoin, but the quoted prices only support 6.78%. This report covers the top five spreads, exchange patterns, fee-adjusted profit math, risks, and tomorrow's watchlist.
Boring Boris here, and today's board was small and a little messy. The system logged 12 arbitrage events on October 13, 2026, but only 10 came through in the feed I was given. Everything below is based on those 10. The widest spread was ARC at 16.16%, with a buy on Bybit at $0.023490 and a sell on KuCoin at $0.025082. Next were 1000RATS at 11.26% (Bybit to KuCoin) and APR at 8.77% (Bybit to KuCoin).
Before anyone sizes up a trade, you need to know what the data does not contain. Pump, dump, buy-pressure and sell-pressure totals all read $0.0M. The feed also has no order-book depth and no timestamps showing how long each window stayed open. I will not invent volume or duration numbers. Where those fields would normally appear, I say they were not captured and tell you how to check them live.
The second issue is a data-quality flag that professional desks should care about. I recomputed each spread from the quoted buy and sell prices. APR on Bybit to KuCoin (8.77%), BTR (6.83%) and TIA on Bybit Spot to Coinbase (4.52%) match their prices. ARC at 16.16% does not: $0.025082 divided by $0.023490 is a 6.78% gap. The second ARC line (buy KuCoin $0.024053, sell Bybit $0.024982) is labeled 6.78% but computes to about 3.87%. Two other TIA lines and the second APR line also come out about 0.1 to 1.5 points off their labels. Most likely the percentages and prices were captured at different moments, or the percentage uses a different reference price such as mid or mark. Treat every label as a pointer to where to look, not as a fill price.
The ARC lines point to a second observation. On one snapshot Bybit was the cheap venue and KuCoin the rich one, and on another the roles were reversed. A spread that flips direction means ARC's price discovery is bouncing between the two venues. That is typical of a thin, small-cap token, and it means any entry could be gone in seconds.
The data shows one clear pattern: Bybit was the cheap venue in seven of the ten listed events (ARC, 1000RATS twice, APR twice, TIA on Bybit Spot) and the sell side only once (the flipped ARC line). KuCoin was the main buy-the-premium venue, appearing as the sell side on ARC, 1000RATS and APR. If you run a screen for tomorrow, a Bybit-low and KuCoin-high filter would have caught most of today's top spreads.
TIA shows a different structure. All three TIA lines are Coinbase as the sell side against Binance or Bybit Spot as the buy side, at 4.39% to 5.24% labeled (about 3.6% to 4.5% by price). That is a consistent USD-venue premium: Coinbase carries a persistent premium on TIA relative to the offshore books. That kind of gap tends to reflect real friction (US-only access, fiat on-ramps, different quote currency) rather than inefficiency. It lasts longer than a small-cap blip, but it is also harder to arbitrage, because moving TIA from Binance to Coinbase takes time and the spread can close while you transfer.
Several pairs you might expect did not appear at all. There were no OKX versus Binance prints, no Bybit versus Bitget prints on the main assets (Bitget showed up once, on APR), and no Hyperliquid versus CEX prints. I will not speculate about why from this data. The honest read is that today's opportunities were concentrated in low-cap tokens on mid-tier venues, while the big-liquidity pairs were quiet. That is normal on a day without a sharp market move: the majors stay tight, and the gaps live where the books are thin.
Small spreads close fast and large spreads close slowly, but the large ones usually exist because something makes them hard to close. The 4% to 5% TIA gap on Coinbase is a slow spread: it survives because capital moves slowly across the Coinbase boundary. The 6% to 9% prints on APR and ARC are semi-fast: they exist because the books are thin, and they vanish when a market maker refills the quote. The 11% 1000RATS print is, in my experience, most likely a pricing or rounding artifact and gets no credit until verified.
Slippage is the main way a good-looking spread turns into a loss. On a token trading at $0.02 with a thin book, a $5,000 market order can walk the book by 1% to 3%. If you pay that on both legs, a 6.78% spread shrinks to roughly 1% to 4% before fees. My sizing rule for this kind of board: start at a position size where your own order moves the book by no more than a quarter of the spread, which usually means $500 to $2,000 on the small caps and larger only if you can see depth at the target price. Use limit orders on the leg that is more likely to fill passively and a taker order only on the leg that carries the risk.
For slow spreads such as TIA, size is less limited by the book and more limited by transfer risk. Pre-position inventory on both venues so you never have to wait for a withdrawal, and treat the spread as a rebalancing trade: sell where it is rich, buy where it is cheap, and settle the inventory imbalance when the spread is small. This takes capital on both sides, but it removes the largest single risk in cross-exchange arbitrage.
All figures below are illustrative. Fee rates and withdrawal costs are assumptions you must replace with your own tier. Example A is the APR trade at 8.77% (buy Bybit at $0.050200, sell KuCoin at $0.054602) with $10,000 per side and pre-positioned inventory.
Example B is the 1000RATS perp-to-perp trade at 7.34% (Bybit to Binance Futures) with $10,000 notional per leg, assuming the spread is real after you verify it.
Minimum spread worth chasing: for pre-positioned spot trades on liquid pairs, I would not move below 0.5% net of fees. For small caps on thin books, I want at least 3% gross, because slippage and fees alone can eat 1.5% to 2%. For anything that requires a withdrawal, add the time-risk cost: if the transfer takes 20 minutes, ask what the token's typical 20-minute range is and demand a spread of at least twice that. By that standard, APR, ARC (at its price-implied 6.78%) and BTR clear the bar, while the 4% TIA prints are only worth it if your inventory is already on both venues.
Based on today's pattern, my watchlist for October 14 starts with APR, which printed on two different venue pairs (Bybit to KuCoin and Bybit to Bitget) and so has the best evidence of a repeating premium. Next is ARC, where Bybit and KuCoin traded as buyer and seller of each other in the same day, so check both directions. TIA on Binance or Bybit Spot versus Coinbase is the steady slow spread worth monitoring if you already hold inventory on both. BTR on Bitunix versus Binance Futures and 1000RATS on Bybit versus Binance Futures are lower-confidence watches until their prices are verified.
For timing, small-cap spreads tend to open around the US and Asia session handoffs and around any sudden move in BTC, when market makers widen quotes on thin books. I would watch the hour around the US open and the first hours of the Asia session. Keep your monitor set to Bybit versus KuCoin as the primary pair, Bybit versus Bitget and Bybit versus Binance Futures as secondary pairs, and Binance or Bybit Spot versus Coinbase for TIA. Also fix the feed: log depth at the quoted price and a timestamp for each event, because without them this report can only say that a spread existed, not whether you could have traded it.
That is the board. Boring, as promised: a few real edges, a few numbers that don't add up, and no volume data to tell you which is which. Recompute before you click, size to the book, and keep inventory on both sides. Arbitrage Hunter — October 13, 2026