Understanding the Orderbook
Yes outcome.No outcome price.Order Book Price Structure Overview
bids) and sell (asks) prices for the Yes side of the market. To understand how to derive the corresponding No side prices, let’s break down the API response and how prices are calculated.Example API Response
{
"success": true,
"data": {
"marketId": 1,
"updateTimestampMs": 1727910141000,
"asks": [
[0.492, 30192.26],
[0.493, 20003]
],
"bids": [
[0.491, 303518.1],
[0.49, 1365.44]
]
}
}asks: A list of the current sell price depth based on the Yes side [price, quantity].bids: A list of the current buy price depth based on the Yes side [price, quantity].Price Calculations
Yes outcome. To get the equivalent prices for the No outcome, use the following calculations:1.
No Buy Price: This is the price at which someone can "sell" No. It’s calculated as:bids array is sorted by price, bids[0][0] gives the highest bid price for Yes. Subtracting this value from 1 gives the corresponding No price.2.
No Sell Price: This is the price at which someone can "buy" No. It’s calculated as:asks array is sorted by price, asks[0][0] gives the lowest ask price for Yes. Subtracting this value from 1 gives the corresponding No price.Notes
bids and asks) data is already sorted, with the best prices first. This makes it easy to access the current highest bid (bids[0][0]) and lowest ask (asks[0][0]) directly for price calculations.Yes and No prices are constrained to the range (0, 1), reflecting probabilities in a market context.bids or asks arrays are empty), additional logic may be needed to handle these cases to avoid errors during price calculation.Yes and No outcomes based on the order book data provided by the API.