> For the complete documentation index, see [llms.txt](https://docs.flash.trade/flash-trade/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.flash.trade/flash-trade/flash-trade-protocol/build-on-flash/flash-trade-v2/guides/limit-orders.md).

# Limit orders

Place, edit, and cancel resting limit orders.

A limit order rests until the market reaches your price. Up to **5 limit orders** per market + side.

## Place

Placing a limit order goes through `open-position` — set `orderType: "LIMIT"` and a `limitPrice`:

```bash
curl -X POST $FLASH_API_URL/transaction-builder/open-position -d '{
  "inputTokenSymbol": "USDC", "outputTokenSymbol": "SOL",
  "inputAmountUi": "100.0", "leverage": 5.0, "tradeType": "LONG",
  "orderType": "LIMIT", "limitPrice": "150.00", "owner": "<WALLET>"
}'
```

Attach exits with `takeProfit` / `stopLoss` in the same call.

## Edit

Change price, size, or attached TP/SL. Per on-chain semantics: for `limitPriceUi` / `sizeAmountUi`, omit (or send `"0"`) to **keep existing**. TP/SL do **not** persist across an edit — re-send a value to keep it, `"0"`/omit removes it.

```bash
curl -X POST $FLASH_API_URL/transaction-builder/edit-limit-order -d '{
  "marketSymbol": "SOL", "side": "LONG", "orderId": 0,
  "limitPriceUi": "148.00", "sizeAmountUi": "0.5", "owner": "<WALLET>"
}'
```

## Cancel

```bash
curl -X POST $FLASH_API_URL/transaction-builder/cancel-limit-order -d '{
  "marketSymbol": "SOL", "side": "LONG", "orderId": 0, "owner": "<WALLET>"
}'
```

Cancelling returns reserved collateral and frees the slot. `orderId` is the slot index (0–4) from the order metrics in [`GET /orders/owner/{owner}`](/flash-trade/flash-trade-protocol/build-on-flash/flash-trade-v2/guides/read-positions-and-orders.md).

→ Full fields: [API reference › Trading › Limit orders](/flash-trade/flash-trade-protocol/build-on-flash/flash-trade-v2/reference/trading.md#limit-orders)


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