What is Swap in Forex? A Complete Guide for Chile Traders (2026)

What Exactly is Swap in Forex?

Swap is the interest rate differential between the two currencies in a forex pair, adjusted for the broker's markup. When you hold a position overnight, you either pay or receive swap depending on whether you are long or short. For example, if you buy a currency with a higher interest rate than the one you sell, you earn positive swap. Conversely, if you sell a high-yielding currency, you pay negative swap. The swap is calculated in pips per lot per night and is applied automatically by the broker.

How Swap Rates Are Calculated

The basic formula is: Swap = (Interest Rate Differential / 365) x Position Size x Broker Markup. For Chile traders using USD accounts, the swap is credited or debited in USD. For instance, if the interest rate on USD is 5% and on EUR is 3%, the differential is 2%. Holding a long EUR/USD position would mean you pay 2% annualized, while shorting EUR/USD earns 2%. However, brokers add their own markup, so actual swap rates may differ.

Why Swap Matters for Chile Traders

Chilean retail traders often hold positions for several days or weeks, especially when trading trends. Swap can significantly eat into profits or add to losses over time. For example, holding a long USD/CLP position (buying USD, selling CLP) typically earns positive swap because USD interest rates are higher than CLP rates (as of 2026). But holding a short USD/CLP position would cost you swap. Understanding this helps you choose the right direction for longer-term trades.

Triple Swap on Wednesdays

Most brokers apply triple swap on Wednesday nights to account for weekend settlement. This means swap is multiplied by three for positions held from Wednesday to Thursday. Chile traders must be aware of this, as it can amplify swap costs or earnings. For example, if you hold a position that costs $5 per night, on Wednesday you would pay $15. Always check your broker's swap schedule.

For Chile traders, swap is particularly relevant when trading the USD/CLP pair, which is the most traded pair locally. Since Chile's interest rate (set by the Central Bank of Chile) and the US Federal Reserve rate differ, the swap can be significant. As of 2026, USD interest rates are higher than CLP rates, so buying USD/CLP (long) earns positive swap, while selling (short) costs swap. This makes long USD/CLP positions attractive for swing traders. However, volatility in CLP due to local economic factors (copper prices, political events) can outweigh swap benefits. When funding your account via Bank Transfer, Skrill, or USDT, ensure the broker converts to USD at fair rates to avoid hidden costs. The Chilean financial authority (Comisión para el Mercado Financiero - CMF) regulates forex brokers operating in Chile, but many traders use offshore brokers. Always verify that your broker is CMF-registered or at least regulated by a Tier-1 authority like FCA or ASIC to ensure fair swap rate disclosure.

1. Check the broker's swap rates
   Before opening a trade, review the broker's swap rates for the specific pair. Most brokers publish long and short swap rates in their contract specifications. For Chile traders, focus on USD/CLP and major pairs like EUR/USD.
2. Calculate swap cost or gain
   Use a swap calculator (many brokers provide one) to estimate the daily swap for your position size. For example, a 1 lot USD/CLP position might earn $2 per night if long, or cost $2 if short.
3. Plan your trade duration
   Decide how long you plan to hold the trade. If holding for weeks, swap can become a major factor. Consider using swap-positive trades for longer holds.
4. Avoid holding through Wednesday if swap is negative
   If your position has negative swap, close it before Wednesday's rollover to avoid triple swap. Alternatively, use a swap-free account if eligible.

Swap vs. Rollover: While often used interchangeably, swap and rollover are slightly different. Rollover is the process of extending a position to the next settlement date, while swap is the interest payment associated with that rollover. For Chile traders, both terms refer to the same cost. Another related concept is the 'tom-next' swap, which is the cost of rolling over a position from today to tomorrow. In practice, brokers apply swap automatically, so you don't need to manually roll over. However, understanding the difference helps when reading broker documentation.

Swap works by applying the interest rate differential between the two currencies in a forex pair to your open position. For Chile traders using USD accounts, the process is automated by the broker. At 5:00 PM New York time (17:00 ET), the broker calculates the swap based on the current interest rates of the currencies involved. If you are long (buying) a currency with a higher interest rate than the one you are selling, the broker credits your account with the positive swap. If the opposite is true, the broker debits your account. For example, if you hold a long position in USD/CLP, and the US interest rate is 5% while Chile's rate is 3%, you earn the 2% differential (minus broker markup). The swap is applied directly to your account balance in USD.

Example 1: Long USD/CLP
You buy 1 standard lot (100,000 units) of USD/CLP at 1 USD = 900 CLP. The US interest rate is 5.5%, Chile's rate is 4.0%. The differential is 1.5% in favor of USD. The broker's markup is 0.5%. Net swap per day = (1.5% - 0.5%) / 365 * 100,000 = approximately $2.74 USD per day. You earn this amount each night you hold the position.

Example 2: Short EUR/USD
You sell 1 lot of EUR/USD. The EUR interest rate is 3.0%, USD is 5.5%. The differential is 2.5% in favor of USD. Since you are short EUR (selling the lower-yielding currency), you pay the differential. With broker markup of 0.5%, you pay 3.0% / 365 * 100,000 = $8.22 per day. This is deducted from your account.

Example 3: Triple Swap on Wednesday
If you hold a short EUR/USD position through Wednesday, the swap cost triples: $8.22 * 3 = $24.66. Always close negative swap positions before Wednesday.

In Chile, forex trading is regulated by the Comisión para el Mercado Financiero (CMF), which oversees financial intermediaries including forex brokers. While the CMF does not have specific swap rate regulations, brokers must adhere to general transparency and fair practice rules. Chile traders should only use brokers that are either registered with the CMF or regulated by a Tier-1 authority such as the FCA (UK), ASIC (Australia), or CySEC (Cyprus). These regulators require brokers to disclose swap rates clearly and apply them consistently. If a broker is unregulated, you have no recourse if swap rates are manipulated. Always verify your broker's regulatory status on the CMF website or the regulator's official register.

• Always check swap rates before trading exotic pairs: USD/CLP can have higher swap rates than majors due to wider interest rate differentials and lower liquidity.
• Use a swap-free account if you trade long-term: If you hold positions for weeks, consider opening an Islamic account to avoid swap fees entirely. Check with your broker for eligibility.
• Monitor central bank interest rate decisions: The Central Bank of Chile and the US Federal Reserve set rates that affect swap. Rate hikes or cuts can change swap direction overnight.
• Factor swap into your risk management: Include swap costs in your trade plan, especially for positions held over multiple days. A trade that looks profitable on entry may become unprofitable after swap deductions.
• Use a demo account to test swap impact: Practice with a demo account to see how swap affects your trades before risking real capital.

Swap is an essential concept for Chile traders who hold forex positions overnight. By understanding how swap works, checking rates before trading, and planning your trade duration, you can minimize costs or even earn positive swap. Remember to factor swap into your overall trading strategy, especially when trading USD/CLP or other pairs with significant interest rate differentials. For the best experience, choose a broker that is CMF-regulated or regulated by a reputable authority, and always compare swap rates across brokers. Ready to start trading? Open a demo account first to practice managing swap costs.