Common trading mistakes start before the order.
Many avoidable errors begin with a vague decision. “The price is moving” describes an observation, but it does not explain why an asset belongs in a portfolio, what could invalidate the idea or how much a person can afford to lose.
A short written plan forces those questions into the open. It need not predict the market; its purpose is to make the size, rationale and review conditions explicit before price changes create pressure.
Mistake one: sizing from optimism
Choosing a position by imagining the desired gain reverses the useful order of thought. Start with the potential loss, the product’s behaviour and the rest of the financial picture. An amount that looks small on a platform can still matter if it is needed for rent, debt or a near-term purchase.
Leverage adds another layer: a small margin deposit can control a much larger exposure. Read the actual loss and liquidation terms rather than using the deposited amount as a proxy for the worst case.
Mistake two: ignoring the round-trip cost
A headline commission is only one part of the cost. Spreads, conversion, financing and withdrawal charges can turn a modest price gain into a disappointing net result. Compare what leaves the bank account with what could return after the full sequence.
For example, an illustrative AUD 1,000 position rising by 2% produces AUD 20 before costs. If combined entry and exit costs were AUD 16, only AUD 4 would remain before tax. The example is arithmetic, not a provider quote or expected outcome.
Mistake three: confusing an instruction with an outcome
An order submission is not always a fill, and a cancellation request is not always a cancellation. Partial execution, slippage and fast-moving markets can change what actually happens. Check the completed status and reconcile the account rather than relying on the button you pressed.
The same distinction applies to withdrawals: “submitted” does not mean “credited to the bank”. Keeping timestamps and references makes follow-up more effective when a stage takes longer than expected.
A practical closing checklist
- State why the exposure fits the plan.
- Set the maximum amount at risk and include existing positions.
- Read the order behaviour and complete fee schedule.
- Define when to review, reduce or stop the activity.
- Keep the execution record and compare it with the original instruction.
None of these habits prevents a market loss. They help separate the uncertainty you deliberately accept from mistakes caused by missing information.