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Yellow.pro supports market and limit orders, plus conditional (stop) orders that activate at a trigger price. The same order types and Time in Force options apply to both Spot and Perpetual markets (examples below use spot pairs). Understanding the difference helps you make better decisions and avoid unexpected outcomes.

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Market Order

A market order is designed for immediate execution, filling against the best available prices in the order book.
  • What you control: the amount (quantity).
  • What you don’t control: the exact price.
When to use: you need to execute immediately, the exact price matters less than getting filled, and the market is liquid. Risk — slippage: in fast-moving or low-liquidity markets, your final fill price may differ from the price displayed at submission. This is normal and expected.

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Limit Order

A limit order lets you specify the exact price at which you want to buy or sell. It only executes at that price or better.
  • Buy limit: the maximum price you’ll pay. A buy limit at 2,050 USDT waits until a seller offers at 2,050 or below.
  • Sell limit: the minimum price you’ll accept. A sell limit at 2,150 USDT only fills if a buyer pays 2,150 or above.
If your limit price matches existing orders already in the book, the order may fill immediately, acting like a market order — this means you were taking available liquidity at your stated price, not an error. When to use: you want a specific price, you’re not in a rush, and you want to avoid slippage. Risk: the order may never fill, and partial fills are possible.

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Market vs Limit — at a glance

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Conditional Orders (Stop Market & Stop Limit)

Conditional orders do not activate immediately. They wait for the market to reach a specified trigger price, then automatically submit a new order. This lets you set up automated entry or exit strategies without watching the market continuously. The order form with a conditional (stop) order selected

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Stop Market

Triggers at your trigger price, then submits a market order immediately.
  • Fields: trigger price, amount.
  • Use it to: cut losses if the market drops to a level (stop-loss), or enter when the market breaks a level — when execution matters more than exact price.
  • Risk — gap: the fill price may differ from your trigger price in fast-moving markets.

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Stop Limit

Triggers at your trigger price, then submits a limit order at your specified limit price.
  • Fields: trigger price, limit price, amount.
  • Use it to: keep price control even after the trigger fires.
  • Risk: if the market moves quickly past your limit price, the order may never fill.

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Stop Market vs Stop Limit

Take Profit and Stop Loss must currently be created manually through the order form — they are not automatically linked to an existing position or order. After placing a TP/SL order, verify the trigger price, the order side, and that your available balance covers the order if it activates.
Setting a Take Profit / Stop Loss order in the order form

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Time in Force (TIF)

Time in Force controls how long an order stays active. Pick it from the TIF dropdown in the order form — it applies to both Spot and Perpetual orders. Market orders are always IOC — they execute immediately against available liquidity and cancel any unfilled remainder. The TIF selector applies to limit (and limit-style) orders, where GTC is the default.

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Maker vs Taker

Your order type affects whether you are a maker or a taker:
  • Taker — your order consumes existing liquidity (market orders, or limit orders that fill immediately).
  • Maker — your order adds liquidity to the book and waits.
See Fees for current maker and taker rates.

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Post only Orders

A post-only order guarantees you are always a maker — and pay maker fees. It’s designed for traders who want to add liquidity to the book and never cross the spread.
  • Always a maker: if the order would match against an order already resting in the book, it is rejected instead of filling. It can only rest as passive liquidity, so you never pay the taker fee.
  • Spot and Perpetual: post-only behaves the same way on both markets — submit, rest, and fill as a maker, or get rejected.
  • Requires a limit price: post-only always needs a limit price. There is no “market post-only”, because a market order is inherently a taker order.
When to use: you want to provide liquidity at a specific price and protect your maker-fee rate, and you’d rather have the order rejected than accidentally pay the taker fee.
If your post-only order is rejected, it means your limit price would have matched immediately against the book. Adjust the price so it rests passively (above the best ask for a sell, below the best bid for a buy) and resubmit.
  • Post-only — guarantees maker status by rejecting any order that would fill immediately. See Post-Only Order above.