Getting 403 Forbidden for some reason

Alpaca Trading
1

I am trying to submit the following market order

{“symbol”: “CDAK”, “notional”: “16666.6666666667”, “side”: “buy”, “type”: “market”, “time_in_force”: “day”}

Getting 403 Forbidden and the following response headers.

I thought maybe it has something to do with fractional amount in notional field, but it works just fine with other tickers.

Any ideas?

Thanks a lot.

Date: Fri, 31 Mar 2023 14:31:04 GMT
Content-Type: application/json; charset=UTF-8
Content-Length: 64
Connection: close
Access-Control-Allow-Origin: *
Vary: Origin
X-Ratelimit-Limit: 200
X-Ratelimit-Remaining: 199
X-Ratelimit-Reset: 1680273064
X-Request-Id: 40fee3323088c57de1d63c23c2f7a1e2
Strict-Transport-Security: max-age=31536000; includeSubDomains
Access-Control-Allow-Credentials: true
Access-Control-Allow-Methods: GET, OPTIONS, PUT, DELETE, POST, PATCH
Access-Control-Allow-Headers: Apca-Api-Key-Id, Apca-Api-Secret-Key, Authorization
Access-Control-Max-Age: 1728000

2

I have to mention that I have sufficient buying power. The issue seem to happen with some tickers and not with others.

3

This seems to happen with some limited set of tickers like BRDS, SCYX, CDAK…The orders for others work just fine.

Really lost here…Please advice.

4

Okay, got the answer. The reason is these tickers do not allow fractional shares, and when notional is used thats exactly what is happening. So if you want a market order, use qty instead.