cdcx-place-limit-order

Place Limit Order

When to Use

• Patient entry at a specific price
• Split a large order into laddered rungs
• Anchor a position before attaching stop/take-profit legs

Requires authentication. Order placement is tier mutate.

The Command

cdcx trade order <SIDE> <INSTRUMENT> <QUANTITY> \
    --type LIMIT --price <PRICE> \
    [--time-in-force GOOD_TILL_CANCEL|FILL_OR_KILL|IMMEDIATE_OR_CANCEL|POST_ONLY] \
    [--client-oid <ID>] \
    [--exec-inst POST_ONLY|REDUCE_ONLY|SMART_POST_ONLY|ISOLATED_MARGIN]

Positional args: <side> <instrument_name> <quantity>. Side is BUY or SELL. Omitting --type defaults to MARKET.

Preflight (mandatory before going live)

# 1. Verify auth
cdcx account info -o json > /dev/null

# 2. Cash check
cdcx account summary -o json | \
    jq -r '.data.total_available_balance'

# 3. Instrument is tradable + get tick sizes
cdcx market instruments -o json | \
    jq '.data.data[] | select(.symbol=="BTC_USDT") |
        {symbol, price_tick_size, qty_tick_size, min_qty, max_qty, tradable}'

# 4. Current market context
cdcx market ticker BTC_USDT -o json | \
    jq '.data[0] | {last:.a, bid:.b, ask:.k, high:.h, low:.l}'
cdcx market book BTC_USDT --depth 10 -o json

Dry-Run (free preview)

cdcx trade order BUY BTC_USDT 0.1 \
    --type LIMIT --price 50000 \
    --client-oid buy-btc-$(date +%s) \
    --dry-run -o json

--dry-run prints the signed request body without sending it. Inspect to confirm every field is correct.

Place

cdcx trade order BUY BTC_USDT 0.1 \
    --type LIMIT --price 50000 \
    --time-in-force GOOD_TILL_CANCEL \
    --client-oid buy-btc-2026-04-17 \
    -o json

Response includes order_id. Store both order_id and your client_oid — either can be used to look up or cancel.

Monitor

# List open orders for this instrument
cdcx trade open-orders BTC_USDT -o json

# Get full detail for one
cdcx trade order-detail <ORDER_ID> -o json
# or
cdcx trade order-detail --client-oid buy-btc-2026-04-17 -o json

Amend (reprice)

cdcx trade amend \
    --order-id <ORDER_ID> \
    --new-price 51000 \
    --new-quantity 0.1 \
    -o json

Both --new-price and --new-quantity are required — re-submit the original value for the side you don't want to change.

Cancel

cdcx trade cancel --order-id <ORDER_ID> -o json
# or
cdcx trade cancel --client-oid buy-btc-2026-04-17 -o json

Patterns

Laddered Entry (4 rungs)

INSTRUMENT=BTC_USDT
QTY_PER=0.025
for price in 49500 49250 49000 48750; do
    cdcx trade order BUY $INSTRUMENT $QTY_PER \
        --type LIMIT --price $price \
        --client-oid "ladder-$price" \
        -o json
done

POST_ONLY (maker-only)

cdcx trade order BUY BTC_USDT 0.1 \
    --type LIMIT --price 50000 \
    --exec-inst POST_ONLY \
    -o json

POST_ONLY rejects the order if it would cross the book (and therefore would fill as taker).

Common Errors

Error	Meaning	Fix
INVALID_PRICE	Price doesn't match price_tick_size	Round to nearest tick from cdcx market instruments
INVALID_QUANTITY	Quantity below min_qty or not a multiple of qty_tick_size	Adjust to a valid rung
INSUFFICIENT_BALANCE	Available < price × quantity (for BUY)	Reduce size or top up
INVALID_TIME_IN_FORCE	Unsupported TIF value	Use GOOD_TILL_CANCEL / FILL_OR_KILL / IMMEDIATE_OR_CANCEL

Notes

• Prices in the API are decimals — send them as strings with a decimal point (e.g. "50000.0" not 50000). The CLI takes numeric forms and formats correctly
• cdcx trade order --help lists every supported flag including STP (self-trade prevention) and isolated-margin arguments
• For bracket orders (entry + SL + TP in one payload) use cdcx advanced create-otoco — see the cdcx-advanced skill