On order book markets, you can hover any price level in the order book to see what it would take to trade up to that level. This helps you check the average price of a larger order before you place it.
See the details for a level
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Go to app.n1.xyz/perps and open a market that trades on the order book.
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Move your cursor over a row in the order book. Every level between the best price and the one you are pointing at is highlighted.
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Read the details in the panel that appears next to the row.
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Move your cursor away to close the panel.
What the panel shows
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Distance from Mid: how far the level's price sits from the current mid price, as a percentage. Ask levels show a positive value, bid levels a negative one.
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Average Price: the average price you would get if the whole highlighted range filled, not the price of that single row.
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Total (asset): the combined size of every highlighted level, in the market's base asset.
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Total (USDC): the combined value of every highlighted level, in USDC.
The numbers are cumulative, so they include the hovered level and every better-priced level above or below it.
See how far your order would reach
On order book markets, the order book also shows how deep your order is expected to go before you place it.
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In the order form, choose Buy / Long or Sell / Short, then select Market or Limit.
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Enter a size. The order book rows your order is expected to fill against are shaded, and a thin line marks the deepest level it would reach.
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Check Est. reach in the trade summary. It shows the price of that deepest level.
The Est. reach row can show:
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A price: the book currently has enough depth to fill your whole order, and this is the furthest level it would reach.
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A price followed by (partial): only part of your limit order would fill right away at your limit price. With GTC the rest stays on the book; with IoC the rest is cancelled.
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Not enough depth within max slippage: a Market order of this size cannot fill completely within your max slippage, so it would not fill. Reduce the size or raise your max slippage.
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Not enough depth at limit price: a Fill or Kill limit order of this size cannot fill completely at your limit price, so it would be cancelled. Reduce the size or change the price.
A few things to know:
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Market orders are previewed only up to your max slippage price. Limit orders are previewed only for the part that would trade immediately against the book.
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Post Only orders do not show a preview, because they never trade immediately.
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Your own resting orders on the other side of the book are not counted, because your order does not fill against them.
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If the deepest level is outside the rows you can see, a marker at the edge of the order book shows which way it is.
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The preview does not appear on RFQ markets, while the order book is not up to date, or while the order form shows an error.
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Like the hover panel, the preview is an estimate based on the book right now. The book can change before your order reaches it.
What to expect
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The figures describe the book as it is right now. The book moves constantly, so an order placed a moment later can fill at a different average price.
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The panel is a preview only. Nothing is submitted while you hover.
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Selecting a level still copies its price into the order form.
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The panel needs a mouse, so it does not appear on touchscreens. On a phone or tablet, tapping a level copies its price into the order form as usual.
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Most RFQ markets do not show an order book. TCGX is an exception: it shows an indicative order book based on modeled, non-executable depth. Hover a TCGX level to see cumulative size and average price, then select Check size estimate to request a current indicative estimate. The displayed level is not an executable order or a guaranteed fill; the trade summary shows the quote used for execution.