# Transaction fee Let’s consider the trading fee ɛ (ɛ \~0.003) impact with its four possible use cases, as follows: ### Buy X: If a trader wants to buy amount 0<ΔX\

If a trader wants to sell amount ΔY>0: he will receive:

### Sell X: If a trader wants to buy amount 0<ΔY< Yc, he should pay:

If a trader wants to sell amount ΔX>0, he will receive:

Implementing fees will change the optimal arbitrage strategy as follows: * If q>1 and f(q)<1/(1+ɛ), the buy strategy would be:

* if q<1 and f(q)> 1+ɛ, the sell strategy would be:

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