Example)

1. Selling 240 BTC at 3772.4USDT in BTC-USDT market by limit order

{
  "market_id":"BTC-USDT",
  "type":"limit",
  "side":"sell",
  "time_in_force":"gtc",
  "limit_price":"3772.4",
  "quantity":"240"
}

2. Buying 0.001 BTC at 3772.4 USDT in BTC-USDT market by limit order

{
  "market_id":"BTC-USDT",
  "type":"limit",
  "side":"buy",
  "time_in_force":"gtc",
  "limit_price":"3772.4",
  "quantity":"0.001"
}

3. Selling 0.1 BTC in BTC-USDT market by market order

{
  market_id: "BTC-USDT",
  quantity: "0.1",
  side: "sell",
  time_in_force: "ioc",
  type: "market"
}

4. buying BTC with 0.01USDT in BTC-USDT market by market order

{
  "cost": "0.01",
  "market_id": "BTC-USDT",
  "side": "buy",
  "time_in_force": "ioc",
  "type": "market"
}

📘

About limit order and market order (limit_price, cost, quantity)

ProBit Exchange supports limit order and market order.

You may use limit order with type: limit, limit_price, and quantity parameters, to put new order with specific price and quantity into orderbook. (cost cannot be used with limit order.)

Or you may use market order with type: market, cost, and quantity parameters, to set market order cost. (limit_price cannot be used with market order.)
Market buy
구매 시 cost를 이용해 시장가 수량의 총 한도를 지정할 수 있습니다. 이 경우 quantity는 사용할 수 없습니다.
판매 시 cost를 이용해 시장가 수량의 총 한도를 지정하고 quantity를 이용해 최대 판매 수량을 지정할 수 있습니다. (cost는 반드시 사용자 잔고보다 작아야 합니다.)

Errors

❗️

400 Bad Request

INVALID_ARGUMENT

• missing: The parameter is not shown in the body.
• invalid: The parameter is not a valid format.
• duplicate: The parameter is already used.
• {"cost": "invalid"} : Cost value out of range. The cost can be found in the /market API.
• If you are doing limit order, price * amount should be in range.
  {"scope": "not allowed scope"} : It occurs when transaction is not allowed in API setting.

INVALID_MARKET

• not_exist: The parameter has a valid format, but related_data is null.
• market_id: Could not found market_id.

NOT_ENOUGH_BALANCE

• Balance doesn't match with your sell condition.

❗️

401 Unauthorized

If we can not determinate your profile, We will reject with this error code.

❗️

429 Too many Request

If you order over [some-order-rate-count] times, you will get this error.
You can get this error when your request is too frequent. In this case, try again after header value ("Retry-After")

❗️

503 Service Unavailable

TRADING_UNAVAILABLE:

• Our server is full-loaded. Please try again a little later.

MARKET_UNAVAILABLE

• The market is closed now. Check out our announcement at our homepage.