Trading

Trading happens on one screen: the market in the toolbar at the top, the chart with the order book and trades beside it, the order ticket floating on the right, and your positions underneath. On a phone, the bar at the bottom switches between the ticket and the chart.

Order types

• Limit: an order that rests on the book at your price until it fills or you cancel it.
• Market: an order that executes immediately against the resting book.

Order options

• Reduce only: an order that can only reduce an open position, never open one in the opposite direction.
• Take profit (TP): closes the position when the mark price reaches the price you set.
• Stop loss (SL): closes the position when the mark price reaches the price you set.

TP and SL attach to the position rather than resting on the book, and are not available on reduce-only orders. A stop set on the wrong side of the current price can never trigger; the ticket says so rather than accepting it quietly.

Leverage and how much you can open

Leverage is an integer from 1× up to the maximum allowed for that market, which differs per market. It is stored per market, not per order.

Press the leverage row on the ticket to change it. The dialog writes the new value when you press Set — one signature, on its own — and the ticket then prices every order at the stored figure. Changing it does not re-price a position that is already open.

Above the submit button the ticket shows what you can open:

max buy  = the largest long you can open now, in USDT
max sell = the largest short you can open now, in USDT

Both come from the backend, and the two are not the same number — they are computed against opposite sides of the book and against whatever you already hold, so a balance that buys 193 USDT of a market may sell 200 USDT of it. Raising leverage raises both. It does not change how far the price has to move against you.

Margin mode

• Cross: your whole perpetual balance backs every position. This is the default, and today the only mode that settles — which is why no figure anywhere claims a single order or position holds some amount of its own.
• Isolated: each position backed on its own, so a liquidation in one does not reach the others. Coming.

Mark price

Positions, unrealized PnL and TP/SL triggers are all marked against the mark price, not the last trade. The ticket shows both, because they are usually a tick or two apart and the difference is what a trigger fires on.

Market data

Quotes, the order book and the trade tape arrive over websockets. When a feed goes quiet the app falls back to polling on its own and keeps showing the last good values — you do not need to reload.