Tradestation provides an easy to use Trading API.
Note
Tradestation is most suitable for AlgoCloud only with accounts over $25,000 USD!
The problem is with their handling of Pattern Day Trading rule, if your account is smaller they don't allow you to open more than 3 trades in 5 days rolling period.
Link account for Tradestation
Step 1 - Prepare your Tradestation credentials
You will need Tradestation Account ID, Client ID and Client secret. Your Account ID is standard ID of your account - you can see it in Tradestation statements. Client ID and Client secret have to be requested by email as per documentation here: How do I get an API Key?.
Step 2 - Link to broker in AC cloud
Once you have your Tradestation credentials keys you can create a connection in AlgoCloud.
Go to Connected accounts screen. This is where you manage all your connections to brokers.
Click on Link account button.
This will open wizard that will lead you through the process.
The first step is to choose your broker from the list of supported ones. You can give your new connected account any name - it will be used internally in AlgoCloud.
The second step is specifying the connection.
Put your Tradestation Account ID, Client ID and Client secret there.
The third step is (optionally) turn on Account protection.
After clicking Next the connection is created.
AlgoCloud will then try to log in to Tradestation API and retrieve basic information about your account like balance, equity, positions.