Fake Volume: Wash Trading Exchange Identification & 3 Verification Indicators

You see some exchange claiming $1B daily volume—but when you actually trade you find huge bid-ask spread, terrible depth. This is likely wash trading.

Why Exchanges Wash Trade

• Attract new users (large volume看起来 credible)
• Improve ranking (CoinMarketCap etc. rankings look at volume)
• Project方 paid listing needs “看起来 active”
• Higher valuation (large volume exchange “worth more”)

Estimated approximately 70% of exchanges’ claimed volume is false or exaggerated.

3 Verification Indicators

Indicator 1: Volume/Visits Ratio

Normal exchanges’ trading volume proportional to website visits. Some exchange claims $1B daily volume but website daily visits only 10,000 → unreasonable.

Verification: Use SimilarWeb etc. tools to check website visits, compare with claimed volume.

If per-visitor trading volume >$500 → extremely likely wash trading.

Indicator 2: Bid-Ask Spread

Normal active exchange BTC spread <0.1%. Wash trading exchange spread可能 0.5-2%—because few real traders narrow the spread.

Verification: Check exchange BTC/USDT bid-1 and ask-1 price差.

• Spread <0.1% → normal
• Spread 0.1-0.5% → suspicious
• Spread >0.5% → extremely suspicious

Indicator 3: Depth Verification

Normal exchange BTC bid-1 has hundreds of thousands to millions USD挂单. Wash trading exchange bid-1 may only have a few thousand USD—once you buy a few hundred USD with market order, severe slippage.

Verification: Check exchange BTC/USDT order book depth.

• Bid-1 >$500K → normal depth
• Bid-1 $100K-$500K → medium depth
• Bid-1 <$100K → extremely poor depth → possibly wash trading

Other Wash Trading Identification Methods

• Large number of identical-amount trades at same time (bot特征)
• Buy/sell ratio near 50/50 too symmetric (real trading不会这么 perfect)
• Small coin trading volume abnormally large (small coins can’t have that much真实 trading)
• Volume suddenly surges then disappears (project方 paid wash trading周期性)

Wash Trading Exchange Real Case

User saw some coin “daily volume $5M” on small exchange, bought $1000 with market order—8% slippage (should be $0). When trying to sell, worse depth, 10% sell slippage.最终 lost 18% purely from exchange having no真实 liquidity.

How to Choose Non-Wash-Trading Exchange

Simple principle: Only use top exchanges. Top exchanges (Gate.io/OKX/Binance etc.) have enough真实 users and don’t需要 wash trade.

Specific checks:

1. Check CoinMarketCap/CoinGecko volume ranking
2. Use SimilarWeb to verify website visits vs volume match
3. Actually trade to check BTC/USDT depth and spread
4. Check community reviews and discussion

Summary

Identify wash trading exchanges 3 indicators: volume/visits ratio合理性, bid-ask spread是否过大, order depth是否真实. Only using top exchanges avoids most wash trading issues.

For more practical methods, see Demonjoy Trading.