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* add docs

* Add Binance exchange support

- Updated the environment configuration to include Binance as a selectable exchange option.
- Enhanced the README documentation to reflect the addition of Binance.
- Implemented the Binance exchange adapter and integrated it into the existing exchange framework.
- Modified the basis arbitrage strategy to support Binance alongside existing exchanges.
- Added tests to ensure proper functionality and integration of Binance within the trading system.

* Enhance README with detailed Binance exchange configuration

- Added comprehensive instructions for setting up Binance as an exchange option.
- Included environment variable specifications for API keys, market types, and trading symbols.
- Provided examples for both perpetual and spot trading strategies.
- Clarified the use of WebSocket and REST for the Binance adapter.

* Enhance exchange support and testing framework

- Added a new test suite for exchange contracts to ensure consistency and functionality across supported exchanges.
- Refactored exchange ID handling to utilize a centralized list of supported exchanges, improving maintainability.
- Updated CLI argument parsing and help documentation to reflect the new exchange structure.
- Introduced utility functions for validating supported exchanges and their display names.
- Enhanced the BasisApp and strategy runner to leverage the new exchange validation logic.
- Added a new test command for running exchange-related tests.

* Refactor exchange contract tests and update CLI commands

- Removed the trailing supported exchanges set and simplified the logic for trailing stop support in the exchange contract tests.
- Updated the test command for exchange contracts to exclude unnecessary tests, streamlining the testing process.
- Enhanced test descriptions for clarity and improved understanding of the functionality being tested.
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Commission FAQ | Binance Open Platform https://developers.binance.com/docs/binance-spot-api-docs/faqs/commission_faq 2026-02-26T10:38:07.334Z

Commission Rates

Disclaimer:

  • The commissions and prices used here are fictional, and do not imply anything about the actual setup on the live exchange.
  • This applies only for the SPOT Exchange.

What are Commission Rates?

These are the rates that determine the commission to be paid on trades when your order fills for any amount.

What are the different types of rates?

There are 3 types:

  • standardCommission - Standard commission rates on trades from the order.
  • taxCommission - Tax commission rates on trades from the order.
  • specialCommission - Extra commission that will be added in specific circumstances.

Standard commission rate may be reduced, depending on promotions for specific trading pairs, applicable discounts, etc.

How do I know what the commission rates are?

You can find them using the following requests:

REST API: GET /api/v3/account/commission

WebSocket API: account.commission

You can also find out the commission rates to a trade from an order using the test order requests with computeCommissionRates.

What is the difference between the response sending a test order with computeCommissionRates vs the response from querying commission rates?

A test order with computeCommissionRates returns detailed commission rates for that specific order:

{    "standardCommissionForOrder": {        "maker": "0.00000050",        "taker": "0.00000060"    },    "specialCommissionForOrder": {        "maker": "0.05000000",        "taker": "0.06000000"    },    "taxCommissionForOrder": {        "maker": "0.00000228",        "taker": "0.00000230"    },    "discount": {        "enabledForAccount": true,        "enabledForSymbol": true,        "discountAsset": "BNB",        "discount": "0.25000000"    }}

Note: It does not show buyer/seller commissions separately, as these are already taken into account based on the order side.

In contrast, querying commission rates returns your current commission rates for the symbol on your account.

{    "symbol": "BTCUSDT",    "standardCommission": {        "maker": "0.00000040",        "taker": "0.00000050",        "buyer": "0.00000010",        "seller": "0.00000010"    },    "specialCommission": {        "maker": "0.04000000",        "taker": "0.05000000",        "buyer": "0.01000000",        "seller": "0.01000000"    },    "taxCommission": {        "maker": "0.00000128",        "taker": "0.00000130",        "buyer": "0.00000100",        "seller": "0.00000100"    },    "discount": {        "enabledForAccount": true,        "enabledForSymbol": true,        "discountAsset": "BNB",        "discount": "0.25000000"    }}

How is the commission calculated?

Using an example commission configuration:

{    "symbol": "BTCUSDT",    "standardCommission": {        "maker": "0.00000010",        "taker": "0.00000020",        "buyer": "0.00000030",        "seller": "0.00000040"    },    "specialCommission": {        "maker": "0.01000000",        "taker": "0.02000000",        "buyer": "0.03000000",        "seller": "0.04000000"    },    "taxCommission": {        "maker": "0.00000112",        "taker": "0.00000114",        "buyer": "0.00000118",        "seller": "0.00000116"    },    "discount": {        "enabledForAccount": true,        "enabledForSymbol": true,        "discountAsset": "BNB",        "discount": "0.25000000"    }}

If you placed an order with the following parameters which took immediately and fully filled in a single trade:

Parameter

Value

symbol

BTCUSDT

price

35,000

quantity

0.49975

side

SELL

type

MARKET

Since you sold BTC for USDT, the commission will be paid either in USDT or BNB.

When standard commission is calculated, the received amount is multiplied with the sum of the rates.

Since this order is on the SELL side, the received amount is the notional value. (For orders on the BUY side, the received amount would be quantity.) The order type was MARKET, making this the taker order for the trade.

Standard Commission = Notional value * (taker + seller)                    = (35000 * 0.49975) * (0.00000020 + 0.00000040)                    = 17491.25000000 * 0.00000060                    = 0.01049475 USDT

Tax commission (if applicable) is calculated similarly:

Tax commission = Notional value * (taker + seller)               = (35000 * 0.49975) * (0.00000114 + 0.00000116)               = 17491.25000000 * 0.00000230               = 0.04022988 USDT

Special commission (if applicable) is calculated as:

Special commission = Notional value * (taker + seller)               = (35000 * 0.49975) * (0.02000000 + 0.04000000)               = 17491.25000000 * 0.06000030               = 1049.47500000 USDT

If not paying in BNB, the total commission are summed up and deducted from your received amount of USDT.

Since enabledforAccount and enabledForSymbol under discount is set to true, this means the commission will be paid in BNB assuming you have a sufficient balance.

If paying with BNB, then the standard commission will be reduced based on the discount.

First the standard commission and tax commission will be converted into BNB based on the exchange rate. For this example, assume that 1 BNB = 260 USDT.

Standard commission (Discounted and in BNB) = (Standard commission * BNB exchange rate) * discount                                            = (0.01049475 * 1/260) * 0.25                                            = 0.000040364 * 0.25                                            = 0.000010091

Note that the discount does not apply to tax commissions or special commissions.

Tax Commission (in BNB) = Tax commission * BNB exchange rate                        = 0.04022988 * (1/260)                        = 0.00015473Special Commission (in BNB) = Special commission * BNB exchange rate                        = 1049.47500000 * (1/260)                        = 4.036442308
Total Commission (in BNB) = Standard commission (Discounted) + Tax commission (in BNB) + Special commission (in BNB)                          = 0.000010091 + 0.00015473 + 4.036442308                          = 4.036607129

If you do not have enough BNB to pay the discounted commission, the full commission will be taken out of your received amount of USDT instead.