# Error "you have provided an invalid symbol polyfeed/trade\_updates"

**URL:** <https://forum.alpaca.markets/t/error-you-have-provided-an-invalid-symbol-polyfeed-trade-updates/1493>\
**Category:** Alpaca Account Troubleshooting\
**Created:** [May 19, 2020, 5:35pm UTC](https://forum.alpaca.markets/t/error-you-have-provided-an-invalid-symbol-polyfeed-trade-updates/1493 "2020-05-19T17:35:40Z")\
**Posts on this page:** 6\
**Page:** 1

<div class="post-metadata">

**Author:** ![yang2007chun](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.alpaca.markets/yang2007chun/32/789_2.png) [@yang2007chun](https://forum.alpaca.markets/u/yang2007chun)\
**Post date:** [May 19, 2020, 5:35pm UTC](https://forum.alpaca.markets/t/error-you-have-provided-an-invalid-symbol-polyfeed-trade-updates/1493/1 "2020-05-19T17:35:40Z")

</div>

## Environment

**Language**  
Node

**Alpaca SDK Version**  
@alpacahq/alpaca-trade-api 1.3.0

**Other Environment Details**  
usePolygon: false

## Problem

**Summary**  
I get the following error when using the paper account

```auto
{"stream":"listening","data":{"error":"you have provided an invalid symbol polyfeed/trade_updates"}}

```

when I try to subscribe to ‘trade\_updates’ with the node api

```auto
alpaca.data_ws.subscribe(['trade_updates'])

```

The node API send the following data through ws after I inspect into the node package

```auto
{"action":"listen","data":{"streams":["trade_updates"]}}

```

which is not “polyfeed/trade\_updates”. Anyone experienced this problem before?

**Paper or Live Tradng?**  
Paper

**Example Code**  
`alpaca.data_ws.subscribe(['trade_updates'])`

---

<div class="post-metadata">

**Author:** ![hitoshi](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.alpaca.markets/hitoshi/32/69_2.png) [@hitoshi](https://forum.alpaca.markets/u/hitoshi)\
**Post date:** [May 19, 2020, 6:47pm UTC](https://forum.alpaca.markets/t/error-you-have-provided-an-invalid-symbol-polyfeed-trade-updates/1493/2 "2020-05-19T18:47:07Z")

</div>

Oh ok so this is Node SDK issue. We’ll see if we can fix it quickly.

---

<div class="post-metadata">

**Author:** ![Shlomik](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.alpaca.markets/shlomik/32/793_2.png) [@Shlomik](https://forum.alpaca.markets/u/Shlomik)\
**Post date:** [May 19, 2020, 6:55pm UTC](https://forum.alpaca.markets/t/error-you-have-provided-an-invalid-symbol-polyfeed-trade-updates/1493/3 "2020-05-19T18:55:10Z")

</div>

Hi,  
there are 2 websocket in the sdk  
one for data updates  
one for account/trade updates  
you can see the example code in the README file  
in short, you should jsut do:

```auto
const updates_client = this.alpaca.trade_ws
updates_client.onConnect(function () {
    console.log("Connected")
    const trade_keys = ['trade_updates', 'account_updates']
    updates_client.subscribe(trade_keys);
})

```

check the readme for more details.

---

<div class="post-metadata">

**Author:** ![yang2007chun](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.alpaca.markets/yang2007chun/32/789_2.png) [@yang2007chun](https://forum.alpaca.markets/u/yang2007chun)\
**Post date:** [May 19, 2020, 6:59pm UTC](https://forum.alpaca.markets/t/error-you-have-provided-an-invalid-symbol-polyfeed-trade-updates/1493/4 "2020-05-19T18:59:11Z")

</div>

> [@Shlomik](#):
>
> `account_updates`

Thanks for the reply! I did just used [‘trade\_updates’] like `alpaca.data_ws.subscribe(['trade_updates'])`

But the response is not expected.

---

<div class="post-metadata">

**Author:** ![Shlomik](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.alpaca.markets/shlomik/32/793_2.png) [@Shlomik](https://forum.alpaca.markets/u/Shlomik)\
**Post date:** [May 19, 2020, 7:02pm UTC](https://forum.alpaca.markets/t/error-you-have-provided-an-invalid-symbol-polyfeed-trade-updates/1493/5 "2020-05-19T19:02:11Z")

</div>

so, the main difference is to use `this.alpaca.trade_ws` not `alpaca.data_ws`

---

<div class="post-metadata">

**Author:** ![yang2007chun](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.alpaca.markets/yang2007chun/32/789_2.png) [@yang2007chun](https://forum.alpaca.markets/u/yang2007chun)\
**Post date:** [May 19, 2020, 7:36pm UTC](https://forum.alpaca.markets/t/error-you-have-provided-an-invalid-symbol-polyfeed-trade-updates/1493/6 "2020-05-19T19:36:17Z")

</div>

> [@Shlomik](#):
>
> trade\_ws

This is resolved by @Shlomik. Thanks 🙂