Prices are moving and the platform looks connected, but every attempt to open a position is refused immediately.
On a prop account most rejections are rule enforcement, not a technical fault. The firm configures limits inside the platform, and the platform refuses anything that breaches them.
A prop platform sits behind a risk layer that the firm controls. Before an order ever reaches the market it is checked against your account's rules: remaining daily loss, remaining drawdown, allowed size, allowed instruments, allowed times. If any check fails the order is refused instantly and nothing is sent onwards. That instant, repeatable refusal is what makes a rule rejection feel like a bug.
A genuine technical fault behaves differently. It is usually intermittent, it tends to affect closing as well as opening, and it normally arrives with other symptoms such as prices that have stopped updating or a connection warning. Rule rejections are consistent; faults are erratic.
Once the rule no longer applies, for example the next trading day begins, or you send an order within the allowed size, the same order type is accepted with no other change on your part. That confirms the block was a rule.
Read your firm's rule sheet before you trade and keep the dashboard open in another tab so you can see how much of your daily loss and drawdown allowance is left. Size positions so a normal losing trade cannot take you into the limit.
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