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Smart Maker Order Strategy (0.00% fee)

One of the biggest advantages of trading on the Revolut X exchange is its fee structure:

Execution type Fee Description
Maker 0.00 % The order adds liquidity to the order book (limit order).
Taker 0.09 % The order removes liquidity (market order, or a limit order matched aggressively).

At larger volumes or in algorithmic trading, the difference between 0.00 % and 0.09 % amounts to a substantial cost saving.

How post_only Protection Works

When you submit a limit order, the market price may move and the order may match against the other side immediately. In that case the exchange would charge the 0.09% (Taker) fee.

The post_only = true flag: - Guarantees that the order enters the order book exclusively as a Maker. - If the order would execute immediately as a Taker, the exchange rejects/cancels it right away at no fee.

Dynamic Maker Price Calculation

The library includes a dedicated MakerOrderStrategy class that computes the optimal limit price from the live market state, with a safety offset:

  • For BUY: $$\text{price} = \text{best_bid} - \text{offset}$$
  • For SELL: $$\text{price} = \text{best_ask} + \text{offset}$$

The price is then rounded to a valid price increment for the trading pair (tick_size).

Usage Examples

from revolut_x import RevolutXClient, OrderSide

client = RevolutXClient(api_key="...", private_key_path="keys/private.pem")

# Fetches the current bid/ask, applies a 0.10 EUR offset and submits with post_only=True
order = client.place_maker_order(
    symbol="BTC-EUR",
    side=OrderSide.BUY,
    quote_size="50.00",
    offset="0.10",
)

use RevolutX\Client;
use RevolutX\Types\OrderSide;

$client = new Client(apiKey: '...', privateKeyPath: 'keys/private.pem');

// Fetches the current bid/ask, applies a 0.10 EUR offset and submits with post_only=True
$order = $client->placeMakerOrder(
    symbol: 'BTC-EUR',
    side: OrderSide::BUY,
    quoteSize: '50.00',
    offset: '0.10'
);