Hedge Mode vs One-Way Mode: Long and Short Positions

One-way and hedge modes describe how a trading system records directional positions. In a one-way setup, opposite orders generally change a net position. In a hedge setup, a product may track long and short positions separately.

This explains general position accounting first; the last section describes how both modes work on PnL World tables.

One-way mode: one net direction

Consider a long position of one unit. Selling 0.4 units in a basic one-way arrangement reduces the long position to 0.6 units. Selling one unit closes it. A larger sell may reverse the direction, unless the order is constrained to reduce exposure only.

The result depends on order flags and system rules. An opposite order is not automatically a new hedge.

Hedge mode: separate directional positions

In a system that supports separate sides, a trader may hold a long position and a short position on the same instrument. The order needs to identify whether it opens or closes the relevant side.

A trader can therefore see two positions rather than a single net number. This is an accounting capability, not a guarantee of economic advantage.

Equal long and short does not mean zero cost

An equal-sized long and short in the same linear instrument can offset much of their immediate directional price exposure. Both positions can still involve costs, collateral requirements and execution differences.

Closing one side changes the exposure. Unequal sizes leave net direction. Different contracts, maturities or instruments introduce additional differences. A hedge needs an explanation of what it offsets and what remains.

Position mode and margin mode answer different questions

Position mode: is exposure netted or recorded on separate directional sides?

Margin mode: is supporting collateral shared or assigned to an isolated position or compartment?

Do not infer one from the other. Read cross versus isolated margin for the collateral distinction.

Before placing an opposite order

Check the instrument, position side, size and any close-only or reduce-only setting. Ask whether the intended outcome is to reduce, close, reverse or hold an offsetting exposure.

If you cannot tell which outcome the order will create, practise using the controls that are actually available before entering a rated event. An order should not become a lesson in position accounting after it fills.

What matters in a tournament

Tournament scoring considers the account's result under its published rules. Recording two sides does not create an extra source of profit or exempt either side from applicable costs.

How it works on PnL World

Both modes are available on every PnL World table. The position mode is a setting of your tournament account, chosen with the gear next to the order form in the Pro terminal:

• One-way is the default. One position per instrument; an opposite market or limit order reduces it and, if larger than the position, reverses it. A reduce-only order can only reduce.
• Hedge mode allows up to two positions per instrument, one long and one short. A normal buy opens or adds to the long, a normal sell opens or adds to the short; closing is done from the position row (close, take-profit, stop-loss), and a closing order never flips the position: anything above the position size is not filled.
• Switching modes is possible only when the account has no open positions and no working orders on any instrument, as on an exchange.
• Each leg is its own position with its own wallet, entry price, entry fee and trade history. Margin is not netted between legs: opening the second leg requires full margin for it. Leverage and margin mode are per instrument and apply to both legs.
• Liquidation: an isolated leg is liquidated at its own price and the other leg keeps running. Cross legs belong to the shared cross pool, and the two legs of one instrument share one liquidation price because the mark moves them together.
• Funding is paid by each leg separately: the long pays when the rate is positive, the short receives.

See the official rules for the current table settings.

FAQ

Does a short always open a separate position? No. It may reduce or reverse a long position, depending on the mode and order settings.

Can a hedge lose money? Yes. Costs, mismatches, execution and changes to one side can produce losses.

Is hedge mode required for good risk management? No. Managing a clear net position is also a valid approach.

Next: Market and limit orders · Position sizing · Cross and isolated margin

---

PnL World uses simulated trading on live market data. No real market positions are opened. Paid tournaments put the entry fee at risk. This article is educational, not financial advice.