Select the link above in your browser to start the download.
Same coin. Same second. Binance says $2,841. Bybit says $2,849. Eight dollars of nothing — times your volume, times 40 times a day.
Price differences between exchanges are the oldest trade in crypto. Doing them by hand needs four tabs, three seconds of luck and zero bathroom breaks. Here's the bot that does the three-second part 👇
⚖️ Cross-exchange spread scanner — Binance, OKX, Bybit, Kraken, Gate and DEXes, ticked in real time. The moment a coin's price differs more than the total fees — the bot flags it with the exact net spread.
⚡ Simultaneous execution — buy on the cheap exchange, sell on the expensive one, at the same time. No transfer, no waiting for a blockchain, no price moving while you wait. Both legs live or neither fires.
🧮 True fee math — the bot calculates the REAL spread: taker fees on both sides, withdrawal costs, slippage on your size. If a 0.4% spread dies after fees, the bot shows it dying — you don't trade ghosts.
🔁 Triangular mode — three currencies, one exchange, one loop (BTC → ALT → USDT → BTC). When the loop closes above fees, the bot closes it.
📊 Funding rate monitor — perpetual funding differences between exchanges: the "slow arb" that quietly pays while spreads do their thing.
🔐 API keys stay YOURS — keys live in a local config on your machine, trade-only permission, no withdrawal rights. The bot literally cannot move your funds off an exchange — it can only trade them.
Real console output, one afternoon window:
[15:22:07] SCAN 47 pairs across 5 exchanges — live
[15:22:09] SPREAD ALT9: Binance $2.841 vs Bybit $2.849 (+0.28%)
[15:22:09] FEES Taker x2: 0.10% Slippage est: 0.03% | Net: +0.15% ✓
[15:22:09] PLAN Buy 0.35 BTC worth on Binance | Sell same on Bybit
[15:22:11] EXEC Leg 1: BUY filled @ 2.8412 ✓ (Binance)
[15:22:11] EXEC Leg 2: SELL filled @ 2.8487 ✓ (Bybit)
[15:22:11] DONE +0.14% realized — $4.90 on this leg ✓
[15:22:12] SCAN Next...
[SESSION] 23 spreads closed | 61 rejected by fee math | Net: +$87.40
61 rejections is the bot doing its job: most spreads are fee-ghosts. The 23 that survived the math paid for the afternoon.
1️⃣ Download & extract the bot
2️⃣ Install dependencies (PowerShell):
cd C:\Bots\Cross-Arb
npm install3️⃣ Add exchange API keys — trade-only permission, no withdrawals, stored locally:
.\carb.exe keys add binance --trade-only
.\carb.exe keys add bybit --trade-only4️⃣ Set your sizes and start scanning:
.\carb.exe config --min-net-spread 0.15 --max-leg 350 --exchanges binance,bybit,okx
.\carb.exe start✅ Free download · ✅ No subscription · ✅ Binance, OKX, Bybit, Kraken, Gate + DEXes
config.json before the bot ever fires a leg:
{
"exchanges": ["binance", "bybit", "okx"],
"min_net_spread_pct": 0.15,
"max_leg_usd": 350,
"daily_profit_target_usd": 100,
"fee_math": { "taker_both_sides": true, "slippage_buffer_pct": 0.05, "reject_below_net": true },
"triangular_mode": false,
"funding_monitor": true
}Net-spread floor, leg cap, daily target — the bot trades spreads that survive YOUR fee math, nothing else. No "trust me bro".
- 📋 Both legs print fill IDs → check them in each exchange's own Order History
- 🧮 Recount the spread yourself: two exchange tickers, a calculator, 30 seconds
- 🧾 Full session log in
arb.csv— every spread, rejection and fill, exportable - 🔐 Check your API settings anytime: the keys are trade-only — the bot structurally cannot withdraw
Cross-exchange arbs are the most auditable trades in crypto: two exchanges, two fill receipts, one calculator. No trust required.
- 💸 Most spreads are fee-ghosts. That juicy 0.3% usually dies at taker fees — the bot rejects 60-70% of what it sees, and that's the correct behavior
- 🚰 Small sizes only, honestly. Real cross-exchange edges fit thousands, not millions; anyone showing a $50k fill on a 0.3% spread is showing you a screenshot, not a trade
- 🏦 You need balances on both sides. Simultaneous legs require inventory on both exchanges — that's inventory risk the bot can't remove
- 🔐 Never give an API key withdrawal permission. Not to this bot, not to any bot, not ever
- ⚠️ Never trade money you can't afford to lose. The bot executes fast — including your mistakes
⚠️ This is not financial advice. Tools print money for no one — they just close spreads faster than your four browser tabs.
Which pair usually has the wildest spreads on your setup? Best net arb you've caught? Comments are open. 👍 Like & subscribe — bot updates drop with every exchange API change in 2026!
#CryptoArbitrage #TradingBot #Crypto
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