> For the complete documentation index, see [llms.txt](https://crypta.gitbook.io/crypta/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://crypta.gitbook.io/crypta/probability-exchange/fees.md).

# Fees

The bankroll liquidity pool will make its long-run profit by charging small transaction fees per trade, acting the same way as an exchange. 

Fees are charged based on a positions margin used and not the nominal value of the position.

$$
fee = rate \* margin;used
$$

For example if a user opens a position for 1,000 units at a price of $10 per unit for a total order value of $10,000 but the margin used is only $1,000, assuming a fee rate of 1%, a user will only be charged a fee of $10 (equivalent to a fee of 0.1% on the nominal value).

Crypta uses the following aggregate market fee structure which acts similar to a market maker-taker fee schedule. The fee schedule is built to encourage traders to open positions to bring the market to equilibrium and minimize bankroll exposure. 

<table><thead><tr><th width="366">Aggregate Market</th><th>Long Fee</th><th>Short Fee</th></tr></thead><tbody><tr><td><mark style="color:green;">>1.00% Long Exposure</mark></td><td>1.80%</td><td>0.20%</td></tr><tr><td><mark style="color:green;">>0.75% Long Exposure</mark></td><td>1.60%</td><td>0.40%</td></tr><tr><td><mark style="color:green;">>0.50% Long Exposure</mark></td><td>1.40%</td><td>0.60%</td></tr><tr><td><mark style="color:green;">>0.25% Long Exposure</mark></td><td>1.20%</td><td>0.80%</td></tr><tr><td>Equilibrium (&#x3C;0.25% Bankroll Exposure)</td><td>1.00%</td><td>1.00%</td></tr><tr><td><mark style="color:red;">>0.25% Short Exposure</mark></td><td>0.80%</td><td>1.20%</td></tr><tr><td><mark style="color:red;">>0.50% Short Exposure</mark></td><td>0.60%</td><td>1.40%</td></tr><tr><td><mark style="color:red;">>0.75% Short Exposure</mark></td><td>0.40%</td><td>1.60%</td></tr><tr><td><mark style="color:red;">>1.00% Short Exposure</mark></td><td>0.20%</td><td>1.80%</td></tr></tbody></table>