In Paper, the trading consequences belong to a practice account. The cash is simulated. A practice purchase changes simulated holdings, and a practice sale changes simulated holdings and cash. A position is the amount of an asset the practice account currently holds. You can use these changes to learn how the app reports activity without buying that asset at your exchange.

The market information can still change while you watch. A chart moving up or down does not turn a Paper position into a real investment. Think of two separate questions: what information is the app showing, and which account would this action affect? Paper answers the second question. The source and timing labels help answer the first.

Read those timing labels carefully. The desktop Paper reference is labeled as Coinbase reference data delayed by forty-five minutes. Other views can show their own freshness or delay messages. Do not assume every number on every screen represents this exact second. When comparing a chart with a transaction, compare the relevant times as well as the prices.

Look next at your Paper cash. Do not expect your starting number to match our example. Existing practice, balance adjustments, and account state can make it different. Where the Paper funds controls are available, Add paper funds opens a practice-capital dialog. Its message explains that only simulated funds change and no exchange money moves.

For example, adding one hundred practice dollars means giving the simulation more cash to work with. It is not an exchange deposit, a reward, or money you can withdraw to a bank. Removing practice capital is also a simulation adjustment. We will keep any adjustment separate from trading results so we do not confuse extra starting cash with a successful trade.

The app may distinguish your total cash from cash that is tradable and cash kept in a profit reserve. Tradable means available for the relevant trading use; it is not a promise that every requested purchase will be accepted. If those amounts differ, inspect their labels. Do not add more practice money simply to avoid learning what is holding an amount aside.

Paper is useful for learning the sequence: make a request, read the response, find the record, and explain the result. It cannot prove that a future Live request will have the same outcome. Live adds actual exchange permissions, account conditions, order handling, and real consequences. A practice result is evidence about the rehearsal, not a guarantee about future trading.

There is one more boundary: Paper describes trading activity, not every action throughout the app. It does not make a subscription purchase, account change, or message to another person fictional. Read those screens on their own terms. For our exercise, we stay with clearly identified Paper trading controls and practice records, so the purpose and the consequences stay easy to explain.