Trading costs directly impact your profitability. Understanding and minimizing them is essential for success.
What is the Spread?
Definition
The Spread:
- Difference between bid and ask price
- Buy at ask, sell at bid
- Cost of transaction
- Broker/market maker profit
Bid and Ask
Explanation:
- Bid: Price you can sell at
- Ask: Price you can buy at
- Ask > Bid always
- Difference is spread
Example
EUR/USD:
- Bid: 1.1000
- Ask: 1.1002
- Spread: 2 pips
Means:
- Buy at 1.1002
- Immediately worth 1.1000
- Start 2 pips negative
- Must move 2 pips to breakeven
Types of Spreads
Fixed Spreads
Characteristics:
- Stay constant
- Regardless of conditions
- Predictable cost
- Common with market makers
Variable Spreads
Characteristics:
- Change with conditions
- Tighter in liquid times
- Wider in volatile times
- Common with ECN brokers
Typical Spread Ranges
| Pair Type | Typical Spread |
|---|---|
| Major pairs | 0.5-2 pips |
| Minor pairs | 2-4 pips |
| Exotic pairs | 5-20+ pips |
Commission
What It Is
Commission:
- Fee per trade
- Separate from spread
- Per lot or per side
- Additional cost
Commission Models
Types:
- Per lot (e.g., $7 per lot)
- Per side (entry and exit)
- Per million traded
- Zero commission (wider spread)
Spread vs Commission
| Model | Spread | Commission |
|---|---|---|
| Standard | Wider | None |
| ECN | Tight | Yes |
| Zero spread | Near zero | Higher commission |
Other Trading Costs
Swap/Rollover
What It Is:
- Overnight holding cost
- Interest rate differential
- Charged daily
- Can be positive or negative
When:
- Positions held overnight
- Past daily rollover time
- Triple on Wednesday (weekend)
Slippage
What It Is:
- Difference between expected and actual price
- During fast markets
- Can be positive or negative
- More with market orders
Withdrawal/Deposit Fees
May Include:
- Bank transfer fees
- Credit card fees
- E-wallet fees
- Currency conversion
Calculating Total Cost
Per Trade
Add Up:
- Spread cost
- Commission (if any)
- Potential slippage
Example
Trade:
- 1 lot EUR/USD
- Spread: 1 pip = $10
- Commission: $7
- Total: $17 per round trip
Impact on Profit
Consider:
- Must make $17 to breakeven
- On a 50-pip target ($500) = 3.4% cost
- On a 100-pip target ($1,000) = 1.7% cost
- On a 10-pip target ($100) = 17% cost
- Smaller targets, higher relative cost
Minimizing Costs
Choose Right Broker
Compare:
- Spreads on your pairs
- Commission structures
- Overall cost
- Execution quality
Trade Liquid Markets
Benefits:
- Tighter spreads
- Less slippage
- Better execution
- Lower costs
Trade Liquid Times
Best Times:
- Market overlaps
- London/New York session
- Active trading hours
- Avoid low liquidity
Reduce Trade Frequency
Impact:
- Each trade has cost
- More trades = more costs
- Quality over quantity
- Costs compound
Use Limit Orders
Benefits:
- No slippage
- Get your price
- May not fill
- Trade-off
Cost Impact on Strategies
Scalping
High Cost Impact:
- Many trades
- Small profits
- Costs significant
- Need very tight spreads
Day Trading
Medium Impact:
- Moderate trade frequency
- Larger targets
- Costs matter
- Still significant
Swing Trading
Lower Impact:
- Fewer trades
- Larger targets
- Cost per trade less relevant
- Swaps more relevant
Spread During Events
Widening Spreads
When:
- News announcements
- Market open/close
- Low liquidity
- High volatility
Protection
Strategies:
- No new position from 30 minutes before to 30 minutes after a high-impact release
- Factor wider spreads into open trades
- Remember stops can slip in a fast market
- Wait for normalization
Key Takeaways
- Spread is the difference between bid and ask
- You start each trade in loss by the spread
- Commissions add to trading costs
- Swaps apply to overnight positions
- Total cost affects profitability significantly
- Choose broker with competitive costs
- Trade liquid markets and times
- Fewer trades means fewer costs
- Scalpers most impacted by costs
- Factor costs into profit calculations
What's Next?
Learn about market liquidity and volatility.
This article is for educational purposes only and does not constitute financial advice.
Risk warning. This is education only, not financial, investment, tax or legal advice, and not a recommendation to buy or sell anything. Trading forex, CFDs, stocks, commodities, futures, options and crypto is high-risk; with leverage you can lose more than you deposit, and most retail traders lose money. Before you trade or invest in any form, check the local laws where you are and the rules of your country of residence, and consider your own financial situation; if in doubt, ask a licensed adviser. Past and tested results, and all examples, are for illustration only and do not guarantee future results.