The Big Idea
Both ECN (Electronic Communications Network) and STP (Straight Through Processing) are types of “No Dealing Desk” forex brokers — meaning they don’t take the opposite side of your trades like Market Makers do. They both route your orders to external liquidity providers. But how they do this differs in important ways. ECN brokers use a true network model where multiple liquidity providers compete for your orders, with the broker charging an explicit commission. STP brokers route your orders to specific liquidity providers (often just a few), with the broker adding a markup to the spread instead of charging commissions. Understanding the difference helps you choose the right model for your trading style and avoid paying for features you don’t need.
Think of ECN vs STP like the difference between an open auction marketplace and a single supplier. ECN is like an open auction at a fish market — multiple sellers shouting prices, you take the best one available, and the auction house charges a small commission for hosting the auction. STP is more like buying fish from a wholesaler — they have one or two suppliers, they pass through the price plus their markup, and there’s no explicit commission because the markup is built into what you pay. Both models bypass the “fish counter at the grocery store” (Market Maker) where prices include large markups and the store has incentive to maximize your costs.
For most retail traders, either ECN or STP can work fine — both eliminate the major Market Maker conflicts of interest. But they have different cost structures, execution characteristics, and complexity levels. Active traders with high volume usually benefit from ECN. Lower-frequency traders often find STP more cost-efficient. The right choice depends on your specific trading style, volume, and account size.
What “No Dealing Desk” Means
Both ECN and STP brokers operate without a “dealing desk” — the manual or automated system that Market Makers use to manage their own market. In a Market Maker, when you place a trade, that trade goes to the dealing desk where the broker decides whether to take the other side, internally match it, or hedge externally.
In a No Dealing Desk model, the broker doesn’t manage their own market position. They pass your order to external counterparties without taking the opposite side themselves. This eliminates the conflict of interest where a broker could profit from your losses.
The difference between ECN and STP is in HOW they route orders externally — to a network or to specific providers — and how they charge for the service.
How STP Works
STP brokers have agreements with a small number of liquidity providers — typically large banks or financial institutions. When you place an order, the broker:
- Receives quotes from their connected liquidity providers
- Adds their markup (the broker’s spread)
- Displays the marked-up price to you
- When you trade, routes the order to the appropriate liquidity provider
- The order fills at the provider’s price; the markup goes to the broker
STP Cost Structure
STP brokers don’t typically charge separate commissions. Their fee is built into the spread. For EUR/USD:
- Real interbank spread: 0.1 pip
- Broker markup: 0.7 pip
- You see and trade: 0.8 pip spread
- No additional commission
STP Characteristics
- Simpler cost structure (just spread)
- No commissions to track
- Fewer liquidity providers means potentially less price competition
- Markup adds to true spread
- Spreads typically 0.8-2.0 pips on EUR/USD
- Good for traders who don’t want commission accounting
Limitations of STP
Because STP brokers route to specific providers (not a competitive network), pricing can be less optimal than true ECN pricing. The broker also might choose which provider to route to based on their own profitability rather than purely on best price for you. Most STP brokers don’t show depth-of-market data, so you can’t see actual liquidity depth.
How ECN Works
ECN brokers connect you to a network of liquidity providers — multiple banks, hedge funds, large traders, and other market participants. Quotes from all participants aggregate into the network. The broker:
- Aggregates quotes from all network participants
- Displays the best bid and best ask from any participant
- When you place an order, it goes into the network
- Order matches against best available counter-quote
- Broker charges explicit commission for facilitating the match
ECN Cost Structure
ECN brokers charge explicit commissions while passing through raw spreads:
- Real network spread: 0.1 pip
- Broker commission: $7 round trip per standard lot
- You see and trade: 0.1 pip spread plus commission
For comparison purposes, $7 commission per standard lot equals about 0.7 pips of “effective spread” on EUR/USD. So total cost is similar to STP, but structured differently.
ECN Characteristics
- True multi-participant marketplace
- Often very tight spreads (0.0-0.3 pips on EUR/USD)
- Explicit commissions added to each trade
- Depth-of-market often visible
- Price improvement sometimes available
- Best for high-volume, scalping, or precision-required strategies
The Commission Math
For EUR/USD, ECN total cost (spread + commission) typically ranges $5-10 per standard lot round trip. STP total cost (just spread) typically ranges $7-15 per standard lot. ECN often wins on cost for active traders, but the math depends on specific brokers.
Side-by-Side Comparison
| Feature | STP | ECN |
|---|---|---|
| Order routing | To specific liquidity providers | To competitive network of providers |
| Number of liquidity sources | Few (1-5 typically) | Many (10+) |
| Spread type | Raw + markup | Raw only |
| Typical EUR/USD spread | 0.8-2.0 pips | 0.0-0.5 pips |
| Commissions | Usually none | $3-10 per standard lot |
| Total cost (active trader) | Often higher | Often lower |
| Total cost (low frequency) | Often lower | Often higher |
| Depth of market visibility | Usually no | Usually yes |
| Price improvement | Rare | Possible |
| Execution speed | Fast | Fastest |
| Typical minimum deposit | $200-1000 | $500-10000 |
| Platform complexity | Moderate | Higher |
| Best for | Most retail traders | Active/professional traders |
Which Should You Choose?
Choose STP If You…
- Trade fewer than 10 times per week
- Have a smaller account ($500-$5,000)
- Prefer simple “all-in spread” pricing without separate commissions
- Are still developing your trading style
- Hold positions for hours or days, not minutes
- Want straightforward platform without complexity
- Don’t need depth-of-market data
Choose ECN If You…
- Trade frequently (20+ times per week)
- Have a larger account ($5,000+)
- Scalp or trade short-term where every pip matters
- Need fastest execution speeds
- Want depth-of-market visibility
- Are comfortable with explicit commission accounting
- Trade major pairs almost exclusively (where ECN excels)
- Run automated strategies that need true market data
The Volume Threshold
A rough rule: if you trade more than 50 standard lots per month, ECN typically wins on cost. Below 20 standard lots per month, STP often wins. Between those, it’s roughly equivalent and other factors matter more.
Examples of the Choice
Example 1 — Sarah’s Swing Trading
Sarah is a swing trader who places about 10 trades per week, holding for 2-5 days each. She uses 2-3 mini lots per trade. Her average monthly volume is around 8 standard lots.
Cost analysis:
- STP at 1.0 pip spread: 8 × $10/pip × 1.0 = $80/month
- ECN at 0.2 pip spread + $7 commission: 8 × ($2 + $7) = $72/month
The difference is small. She chooses STP for its simplicity and lower minimum deposit. Her trading isn’t volume-sensitive enough to justify ECN’s added complexity.
Example 2 — Jake’s Scalping Strategy
Jake scalps EUR/USD with high frequency. He places 30-50 trades per day, holding for 5-30 minutes each. Monthly volume: 200+ standard lots.
Cost analysis:
- STP at 0.8 pip spread: 200 × $10/pip × 0.8 = $1,600/month
- ECN at 0.1 pip spread + $7 commission: 200 × ($1 + $7) = $1,600/month
Surprisingly close on this comparison, but ECN advantages are more than just cost: tighter spreads mean his stops execute closer to intended prices, and depth-of-market helps him assess liquidity before entries.
For pure cost, similar. For execution quality, ECN wins. He chooses ECN for the precision benefits.
Example 3 — Maya’s Hybrid Approach
Maya has accounts at both an STP and an ECN broker. She uses each for different parts of her trading:
- ECN: For her active intraday EUR/USD trading where spread matters
- STP: For her longer-term position trades where simpler accounting helps
This hybrid approach uses each broker’s strengths. The downside: tracking two accounts, two sets of rules, two platforms. Worth it if you have varied trading styles.
The Hybrid Reality
The pure ECN/STP/Market Maker categorization is somewhat theoretical. In practice, many brokers use hybrid models:
STP-ECN Hybrids
Many “STP” brokers actually do internal matching when convenient (when client A’s buy order can match client B’s sell order) and only externalize the net residual flow. This isn’t pure STP but it isn’t quite Market Maker either. The lack of dealing desk decisions still removes most conflicts.
“ECN” Branding Issues
Some brokers market themselves as ECN when they’re really STP. The lines get blurred. Real ECN should have:
- Multiple liquidity providers (not just 1-3)
- Depth-of-market data shown
- Possible price improvement
- Explicit commissions
If a broker is missing these features but calls themselves ECN, they’re probably STP-rebranded.
Account Type Variations
Many brokers offer multiple account types within their offering. The same broker might have:
- Standard account: Market Maker style with wide fixed spreads
- STP/Pro account: Tighter variable spreads with markup
- ECN account: Raw spreads with explicit commissions
The broker handles different account types differently behind the scenes. You can sometimes choose your model by selecting the right account type from the same broker.
Verifying the Reality
How can you tell if a broker is really delivering what they claim?
Spread Behavior During News
True ECN/STP brokers will show wider spreads during major news events because real market spreads widen. If a broker maintains tight spreads through NFP or FOMC, they’re doing something other than passing real market conditions through.
Depth of Market
Real ECN platforms show DOM with visible liquidity at multiple price levels. If you can’t see DOM, you’re probably not on a true ECN.
Slippage Characteristics
STP and ECN should have slippage on stops during fast markets — that’s real market behavior. Market Makers might mysteriously have stops execute exactly at planned prices regardless of market conditions, suggesting internal price control.
Independent Reviews
Trader forums and review sites have institutional knowledge about which brokers really offer what they claim. Be careful with paid reviews; rely on community discussions instead.
Common Mistakes
- Choosing ECN solely for marketing. Just because “ECN” sounds professional doesn’t mean it suits your trading.
- Ignoring total cost analysis. Comparing only spreads or only commissions instead of total per-trade cost.
- Trusting “ECN” labels. Many brokers misrepresent their model.
- Beginner using ECN immediately. Higher minimums and complexity than needed.
- Active trader using STP. Higher volume traders typically benefit from ECN.
- Not using depth-of-market data. Paying for ECN without leveraging its visibility benefits.
- Forgetting commission tracking. ECN commissions need to be in your trade math.
- Switching too often. Changing brokers frequently disrupts trading consistency.
- Choosing based on ads. Both ECN and STP brokers advertise heavily; advertising isn’t useful information.
- Ignoring regulation. Both ECN and STP brokers can be unregulated and dangerous.
The Big Picture
ECN and STP are both valid No Dealing Desk models with different trade-offs.
Here’s what to remember:
- Both ECN and STP avoid Market Maker conflicts of interest
- STP routes to specific liquidity providers; ECN to a network
- STP charges through marked-up spreads; ECN through commissions
- ECN typically has tighter raw spreads but explicit commissions
- STP is simpler but less optimal for high-volume traders
- ECN is more complex but better for active traders
- Total cost analysis depends on volume and trading style
- Many brokers blur the lines with hybrid models
- Volume threshold around 50 standard lots/month often determines optimal choice
- Both require regulation and proper due diligence
The good news for retail traders: both ECN and STP brokers offer fundamentally fairer trading conditions than Market Makers. The structural conflict of interest where the broker profits from your losses is largely eliminated. Either is better than a typical Market Maker for serious trading.
The choice between ECN and STP comes down to your specific situation. Active traders with substantial volume usually benefit from ECN. Casual or intermediate traders often find STP more practical. Neither is universally better — they’re tools suited to different jobs.
Many traders start with STP and graduate to ECN as their volume grows and their style develops. This natural progression lets you experience the simpler model first before tackling ECN’s complexity. Some traders never need ECN — their style works fine on STP indefinitely.
Don’t get caught up in broker-type theology. The community sometimes treats ECN as inherently superior, but for many retail traders this isn’t accurate. STP brokers can serve smaller, less active traders perfectly well. Focus on your actual trading needs rather than theoretical broker model superiority.
What matters more than ECN vs STP: regulation, financial stability of the broker, platform reliability, customer service quality, withdrawal ease, and pair selection. These mundane factors affect your daily experience more than the specific broker type.
One important reminder: a regulated STP broker is far better than an unregulated “ECN” broker. Don’t sacrifice regulatory protection for marginally better technical execution. The risks of fund seizure, fraud, or platform manipulation with unregulated brokers vastly outweigh the technical benefits of any execution model.
Choose your broker thoughtfully. Match the model to your style. Verify they deliver what they promise. Then focus on actual trading rather than broker selection drama.
Related Terms
- Forex Broker Types — All three types compared
- What Is Spread? — Major cost component
- What Is Slippage? — Real market characteristic
- What Is Liquidity? — Why ECN/STP matter
- What Is Order Execution? — How orders fill
← Back to the Complete Trading Terms Glossary
Focus on the process. Trust the stats. Stay consistent.