How to Connect a Trading 212 Account to Acubic

The question a Trading 212 user is asking when they search "connect Trading 212 to Acubic" is procedural: they know what they want and they need the steps. This article is that walkthrough, in order, with enough context to understand each step without reading five other pages. If you want to understand what the connection does once it is established, what it can see, and how each automation mode behaves in practice, how Acubic works with Trading 212 covers that separately.

Before you start: build a strategy first

Two things must be in place before you can connect. You need a Trading 212 Invest or Stocks ISA account, and you need a saved strategy in Acubic. The strategy requirement is less obvious but it is not optional.

Acubic binds a broker connection to a specific strategy. The connection is not a general account link: it attaches to a saved strategy, and that strategy must exist before there is anything to connect to. One connection is enforced per strategy at the database level, so two strategies cannot both manage the same Trading 212 account at the same time.

The strategy creation step runs entirely without a broker. Acubic asks about your goals, risk tolerance, and the asset categories you want to include. The engine constructs a target portfolio from your answers and shows you the proposed holdings with their weights. Review them. Nothing touches Trading 212 at this stage. If you want the complete picture of what happens between setting goals and having live positions at your broker, how Acubic works is the end-to-end guide.

Step one: generate a Trading 212 API key

A Trading 212 connection uses an API key, not the OAuth flow that the eToro connection uses. The practical difference is worth understanding. With OAuth, you authenticate on the broker's own login page and the broker issues a scoped token to the third-party application; your password never touches the application at all. With an API key, you generate a separate credential in the broker's settings panel and paste it into Acubic, which uses it server-side from that point on.

Both approaches protect your login credentials. Your Trading 212 password is never shared with Acubic: the API key is a distinct, revocable credential that exists independently of your Trading 212 account login. The moment you delete or revoke the key inside the Trading 212 app, Acubic's access ends, independently of anything you do in Acubic. The off switch is yours, not Acubic's.

To generate the key: open the Trading 212 app, go to Settings, then API (Beta), then New API key. Name it something recognisable, such as "Acubic".

Step two: set the permissions

Once you create the key, Trading 212 asks which permissions to enable. Enable exactly these six:

• Account data
• Portfolio
• Metadata
• Orders - Read
• Orders - Execute
• History - Orders

Leave both Pies permissions off. Acubic does not use Pies: it reads positions and places equity orders directly, and the Pies permission is deliberately absent from the required set. Enabling it adds no capability and extends access beyond what the connection needs.

At this point you have one optional choice: whether to restrict the key to Acubic's server IP address. The connection screen inside Acubic displays the server IP. You can paste it into the IP restriction field in Trading 212 before saving the key. Acubic uses the key server-side rather than from your own device, so the restriction does not prevent anything the application needs to do, and it means the key cannot be used from any other address even if it were somehow obtained by someone else.

Copy the API key and the corresponding secret before closing the panel. Trading 212 shows the secret only once at creation time. If you close without copying it, delete the key and generate a new one.

Step three: paste the key into Acubic and set up the connection

In Acubic, navigate to the broker connection section for your saved strategy and select Trading 212. Paste the API key and secret into the fields provided. Acubic stores them encrypted at rest and never returns them to the browser.

You then set three values that govern how the connection behaves:

• Capital figure: how much of your Trading 212 account Acubic manages. This defines the boundary within which it reads positions and places trades. Positions outside this figure are not touched. Your account does not need to be dedicated to Acubic: you can hold other positions independently alongside the managed set. The figure can be changed at any time without reconnecting.
• Rebalance frequency: monthly, quarterly, or annually. A monthly schedule catches drift more often but generates more trades and turnover. Quarterly is a reasonable starting point for most diversified portfolios. The frequency can be changed at any time without reconnecting.
• Automation mode: monitoring only, one-click approval, or unattended rebalancing. The next section explains what each mode does and how they differ from eToro.

Invest and Stocks ISA accounts are supported. CFD accounts are not, and the required permission set does not provide access to them regardless.

Which automation modes are available

This is the part that distinguishes a Trading 212 connection most clearly from an eToro connection, and it is worth being precise about.

A standard eToro main-account connection supports monitoring and one-click approval only. Unattended rebalancing on eToro requires a separate mirrored account, a sub-account funded apart from the main balance. A Trading 212 API key is scoped to your whole Invest account and there is no equivalent sub-account structure, so all three automation modes are available directly on your main account from the first day you connect.

• Monitoring only: Acubic reads your live positions and tracks their drift from the strategy's target weights, but never places an order. Nothing touches the account. Useful if you want to see how the tool reads your account before committing to any automated trading activity. You can switch to one-click at any point.
• One-click approval: Acubic prepares the rebalance order set on your chosen schedule and presents it for your review. Nothing is sent to Trading 212 until you approve.
• Unattended rebalancing: scheduled rebalances execute without a per-order prompt, behind the same safety guards as one-click: one order in flight at a time, round-down position sizing, and a managed-value sanity check that halts the run if the calculated trade set is implausible. Every order is recorded in the audit log with the broker's stated outcome.

For a full treatment of what each mode does and how to decide between them, one-click vs full-auto rebalancing covers the decision end to end. If you hold accounts with both Trading 212 and eToro and want to understand how the broker choice affects which modes are available, eToro vs Trading 212 for automated investing explains the structural reasons in detail.

What happens on the first rebalance

Once the connection is live, Acubic reads your current Trading 212 positions, compares them against the target weights of the connected strategy, and constructs the minimum set of trades needed to close the gap. On one-click approval, it presents that order set for your review before anything is sent. On unattended, it executes the run and records every order in the audit log.

A rebalance is not a liquidate-and-rebuild. Positions already at their target weight are not touched. If nothing has drifted meaningfully since the portfolio was last aligned, nothing trades. Positions you held before connecting, and any positions outside the managed capital figure you defined, are left exactly where they are. Your Trading 212 account does not need to be cleared of existing holdings before connecting.

Adjusting settings after connecting

All three connection settings can be changed at any time without disconnecting and reconnecting.

• Capital figure: expand or reduce the portion of the account Acubic manages. The change takes effect at the next rebalance run.
• Rebalance frequency: switch between monthly, quarterly, and annually. The new frequency takes effect at the next scheduled run.
• Automation mode: switch between monitoring only, one-click approval, and unattended rebalancing at any point.

How to disconnect

You can end the connection from inside Acubic, or delete the API key directly from the Trading 212 app. Either action stops Acubic from sending further rebalance orders. Your existing positions are not affected: every holding stays exactly where it is in your Trading 212 account. Acubic stops acting; it does not close anything on the way out.

This is the most important thing to know about the exit. Disconnecting from an automated portfolio tool should never be an event that costs you money, and here it is not. The exit is free and leaves your account unchanged.

Where to go from here

The connection is now established. Acubic will check whether a rebalance is due at the next scheduled date and either send the order set or present it for your approval, depending on the mode you chose.

For the complete reference on what the Trading 212 connection can see, how it handles rejected orders, and how the managed-set boundary works in practice, the detailed guide is how Acubic works with Trading 212. If you are still deciding whether to connect, or want to understand the full automation picture before committing to a mode, how to automate a Trading 212 portfolio covers the process end to end. To review the integration page with the full setup walkthrough and question list, go to the Trading 212 integration page.