Forex trading comes in two forms - cash (spot) forex and currency futures. Understanding the difference helps you choose the right instrument for your strategy.
Cash Forex (Spot)
Cash forex is buying one currency while selling another at the current market price. EUR/USD spot means buying euros with dollars. Delivery is theoretically T+2 (two business days) but retail positions roll forward indefinitely with overnight swaps.
Advantages: flexible position sizes, 24/5 trading, deep liquidity, no expiration dates.
Disadvantages: overnight swap fees, counterparty risk with your broker, no central exchange clearing.
The sizing flexibility is the quiet advantage. You can risk exactly 1 percent of a 500 dollar account using 0.03 lots, precision that no standardized contract can match.
Currency Futures
Currency futures are exchange-traded contracts with standardized sizes and expiration dates. CME euro futures have 125,000 euro contract size, quarterly expirations, and central clearing.
Advantages: exchange clearing eliminates counterparty risk, transparent pricing, regulated margin.
Disadvantages: fixed contract sizes, limited trading hours, rollover costs at expiration.
The Overnight Swap in Numbers
Swaps are where spot accounts quietly bleed. Holding one a full-size EUR/USD position long typically costs several dollars per night, set by the interest rate differential plus broker markup. Wednesday nights charge triple to cover the weekend. A swing trade held a month can surrender 30-60 pips to financing alone, and carry trades flip the sign entirely: buying a high-rate currency against a low-rate one earns swap, a trade that pays steadily until the reversal that wipes out months of income in a day.
Micro Contracts Changed the Math
Futures are no longer only for institutions. CME E-micro contracts trade at a fraction of the classic 125,000 euro size, and exchange margin runs near 2 percent of notional. Fixed commissions per contract make costs predictable at size. For accounts above 10,000 dollars that want exchange clearing, micro futures have become a legitimate middle path between spot flexibility and full-size contracts.
Rollover dates deserve a calendar entry. Quarterly futures expire on set dates, and open interest migrates to the next contract over the final week, when the spread between old and new contracts confuses any strategy built on continuous quotes. Spot traders face a smaller version of the same effect daily at the 5 PM ET rollover, when spreads widen for a few minutes.
Margin and Leverage Compared
Leverage rules depend on the wrapper. Offshore spot brokers may offer up to 500:1, European retail caps sit near 30:1, US dealers at 50:1, and futures margin is set by the exchange and moves with volatility. High leverage lowers the capital tied up per position, but it is a capital efficiency tool, not a strategy. Every account that blew up on a rate decision was levered correctly right up until it was not.
Which to Choose on Mongkolwallet
Mongkolwallet offers cash forex with spreads opening at 0.2 pips and 28ms execution. Negative balance protection applies to every account. Positions remain open as long as you maintain margin.
For most retail traders, cash forex is more practical - smaller position sizes, flexible hours, no rollover mechanics. Use futures if you specifically need exchange-cleared positions or are hedging a future currency exposure.
News Trading Considerations
Event traders should note the session gap. CME futures close for maintenance daily and over the weekend, so positions cannot exit through a Sunday gap. Spot platforms quote continuously from Monday morning in Asia, though spreads widen around rate decisions and the daily rollover window. If you hold through central bank announcements, having a stop that actually works at 2 AM matters more than the clearing model behind it.
Trade the instrument that matches your strategy, not the one that sounds more professional. Test the plan on a Mongkolwallet demo with live-size positions, log swaps as a cost line in the journal, and switch structures only when the numbers in that journal say so.