Ethereum API Error: Incorrect Price Relationship

As a cryptocurrency trader, it is not uncommon to encounter issues when attempting to execute orders on various exchanges. One such issue can arise from incorrect price relationships between the order type (e.g., sell) and the exchange’s market data.

In this article, we will explore an example of how an API error occurred with Ethereum (ETH) due to a mismatch in price relationships for sell orders on Binance.

The Problem:

Let’s say you’re using a Python program to trade on Binance with VS Code. You’ve chosen the following parameters:

• Order Type: Sell

• Trade: Binance (USDT)

• Price:

+ Buy: 1.5174 USDT

+ Sell: 1.5084 USDT

However, you’ve selected a price for the sell order of $1.51143181.

The Error:

After submitting your request to execute the sell order on Binance, you’ve noticed an error message stating that:

• APIError(code=-2010): The price relationship is incorrect.

The Cause:

In the Ethereum blockchain, the price of a token (e.g., FTM) at a given time is calculated based on its market value at a particular timestamp. When you specify a buy or sell price for an order, you are essentially looking for the current market value of that token in real time.

Here’s what happens:

• Binance retrieves the latest USDT prices from its internal servers.

• Based on those prices, it calculates the market value of FTM at the specified timestamp (buy or sell).

• However, if the price relationship between FTM and USDT is not defined correctly (for example, due to an error in data retrieval or calculation), Binance will return an error code (-2010).

The solution:

To fix this, you need to make sure your API request includes the correct price relationships. You can do this by specifying a lower buy price and a higher sell price.

For example:

buy_price = 1.5174
sell_price = 1.5084









Assuming you have retrieved the latest prices from Binance
current_usdt_price = ... 
retrieve the current market value of USDT
current_ftm_price = current_usdt_price / current_usdt_price - sell_price 
calculate FTM price based on the current USDT price and the sell price

My sample code:

Here is an updated example of how you can modify your Python code to solve this problem:

import requests

Define the Ethereum price API endpoint
api_endpoint = "

Define the buy and sell price parameters.
buy_price = 1.5174
sell_price = 1.5084

Define the exchange (in this case, Binance)
exchange = "binance"

Make a GET request to retrieve the latest prices
response = request.get(api_endpoint + "?symbol=FTM&side=ask&tsyms=USDT")

Check if the response was successful
if response.code_status == 200:

Parse the JSON response
data = response.json()

Calculate the FTM price based on the current USDT price and the sell price
current_usdt_price = float(data["data"][0]["ask"])
current_ftm_price = current_usdt_price / current_usdt_price - sell_price

Create a new order request with the correct parameters
order_data = {
"type": "limit",
"side": "sell",
"currency": exchange,
"price": current_ftm_price
}

Make a POST request to execute the order
response = request.post(" json=order_data)

By making these changes, you should be able to resolve the API error and successfully execute your sell orders on Binance.