Aggregator Quotes Split Your Swap, and Only One Number Is Promised
How Jupiter style aggregators split a swap across pools, why that beats any single pool, and which quote fields are estimates and which are limits.
November 2, 2026, 4 min readBlog
How spreads work, what they really cost and how to read them.
Cooldowns, Rate Limits and a Budget of 30 Alerts a Minute
A cooldown limits one route on one rule, and the rate limit caps your whole account. See both at work in a flickering route and a 36-alert burst.
November 2, 2026, 5 min readAnnouncement Dates Are Not Listing Times
A listing post's date tells you when it was published, not when a market opened. See how that error can use up a whole 72-hour new listing window.
November 2, 2026, 4 min readAPI Key Safety for Traders, Beyond Turning Off Withdrawals
A key with no withdrawal right can still drain an account through a thin market. Learn the permissions, IP rules and habits that limit a leaked key.
November 2, 2026, 4 min readAPI or Webhook: Polling, Streaming and Push Compared
Polling, the websocket stream and webhooks each suit a different job. Compare their limits and lag with worked numbers, plus a hybrid that fixes stale alerts.
November 2, 2026, 5 min readAPI Orders Can Cost More Than Clicking the Same Trade
On Toobit, Paradex and BingX an advertised low rate may not reach API orders. Read the conditions, then see what they do to one route.
November 2, 2026, 5 min readArb Windows and Averages, or How One Long Window Flatters a Route
A route's arb window is a mean, and one long stretch can drag it far above the typical case. See worked numbers and what to do with the figure.
November 2, 2026, 5 min readKill Switches for Bots That Act on Trading Signals
A faulty bot can lose money faster than you can reach it. Learn which limits to code in, what exchange cancel timers do and the retry trap in webhooks.
November 2, 2026, 5 min readBasis Points Explained, Plus Four Mistakes Traders Make With Them
One basis point is 0.01%. Learn the quick conversions, then the four errors that catch traders, from percent of percent to adding bps and dollars.
November 2, 2026, 4 min readBest Size vs Max Size on an Arbitrage Route
Net dollars rise, flatten, then fall as a trade grows. A worked ladder shows why the largest profitable size can be a poor one to trade.
November 2, 2026, 4 min readBinance Fees for Arbitrage: BNB Beats the First VIP Tiers
Binance VIP 1 and 2 leave the spot taker fee at 0.10%. See what BNB really saves, what holding it costs, and how transfer fees hit small trades.
November 2, 2026, 5 min readWhat Bitfinex's Zero Fees Leave You Paying on an Arbitrage Route
Bitfinex charges no maker or taker fee, which saves one leg. The bill that remains: USD quotes, withdrawals, wires, and lenders' 15% cut.
November 2, 2026, 4 min readBitget Fee Groups: Do Groups A, B and C Change What You Pay?
Bitget's pair groups only change PRO rates, from PRO3 up, and PRO needs an API share over 20%. Which accounts they touch, and what a new listing pays.
November 2, 2026, 5 min readKorean Fee Vouchers Expire: Bithumb and Coinone's 30-Day Clocks
Bithumb's 0.04% coupon and Coinone's 0% voucher last 30 days and must be claimed. What a lapse costs on a route, and what vouchers may not cover.
November 2, 2026, 5 min readOn Bitkub, Ten USDT Pairs Beat 464 Baht Pairs on Fees
Bitkub charges 0.25% on baht pairs and 0.1% on the USDT pairs added in July 2026. See when each applies, and how the fee shrinks the coins you withdraw.
November 2, 2026, 4 min readBitstamp's Stablecoin Discount and the EUR Exit
Bitstamp lists a stablecoin rate well under its 0.40% entry fee. See what that does to a euro route, why the sources disagree, and how to check your own rate.
November 2, 2026, 4 min readFind a Bitvavo Market's Fee Class Before You Trade
Every Bitvavo market carries a fee category in its public API. Learn to read it, and why a euro exit through USDC changes a route's cost.
November 2, 2026, 4 min readDoes a Book Refill After a Sweep? Staging a Large Order
Splitting an order only saves money if resting liquidity comes back faster than price moves away. Test both outcomes on a worked three-slice order.
November 2, 2026, 4 min readThe Break-Even Spread Formula, Derived With Fixed Costs
Derive the exact gap a trade needs to pay for itself, see why flat costs make small trades lose, and find the minimum size for any spread.
November 2, 2026, 4 min readUSDC.e and USDC Are Different Tokens
Bridged and native USDC have separate contracts on the same chain. See how to tell them apart, what an exchange accepts, and what fixing a mix-up costs.
November 2, 2026, 4 min readWhen a Bridge Beats an Exchange Withdrawal
A bridge adds steps and contract risk, so it needs a reason. See the cases where it wins for moving stablecoins, with Circle's CCTP fees worked through.
November 2, 2026, 4 min readBybit's Fee Zones Can Double the Cost of the Same Trade
On Bybit, a coin's zone sets your fee. A map of Adventure, Innovation and Pre-Market rates, and why VIP and Pro have opposite API rules.
November 2, 2026, 5 min readCapital Turnover and Why Percent per Trade Misleads
A 0.40% trade can earn less than a 0.10% one. Learn how turns and idle money set your real return, and why annualising one good trade fails.
November 2, 2026, 4 min readCEX to DEX Arbitrage and Why the Chain Leg Sets the Pace
A route between an exchange and a pool has one instant leg and one that waits for a block. Learn how that changes leg order, failure cost and sizing.
November 2, 2026, 4 min read