ECN (Electronic Communication Network), STP (Straight-Through Processing), and Market Maker represent three distinct retail FX broker execution architecture categories with substantially different spread, commission, and execution characteristic frameworks. ECN brokers route client orders to ECN liquidity pools with sub-pip raw spreads plus separate commission structure. STP brokers route client orders to liquidity provider counterparties without dealing desk intervention. Market maker brokers internalize client orders against broker book with broker-defined spreads plus typically zero commission structure. We pulled the three-architecture comparison, the spread plus commission implications, and the trader selection framework across the three execution categories.

ECN broker execution model

ECN architecture characteristics:

Order routing. Client orders routed to ECN liquidity pool aggregating multiple liquidity provider quotes.

Spread structure. Raw inter-bank-style spreads (sub-pip on major pairs typically) plus separate commission structure.

Commission structure. Round-turn commission per traded volume — typically $3-7 per side per standard lot.

Execution speed. Substantially fast execution reflecting electronic ECN framework.

Slippage characteristic. Variable slippage reflecting ECN market depth conditions.

Transparency. Substantial transparency reflecting market depth visibility framework.

Account minimum requirements. Often higher account minimum requirements reflecting institutional-style framework.

ECN model represents transparent execution framework with separated commission pricing structure.

STP broker execution model

STP architecture characteristics:

Order routing. Client orders routed to liquidity provider counterparties without broker dealing desk intervention.

Spread structure. Liquidity provider spreads passed through to client with broker markup.

Commission structure. Often no separate commission — broker compensation through spread markup.

Execution speed. Substantially fast execution reflecting straight-through processing framework.

Slippage characteristic. Variable slippage reflecting liquidity provider conditions.

Transparency. Moderate transparency reflecting liquidity provider routing framework.

Account minimum requirements. Substantially flexible account minimum requirements.

STP model represents intermediate execution framework supporting liquidity provider routing without broker dealing desk intervention.

Market maker broker execution model

Market maker architecture characteristics:

Order routing. Client orders internalized against broker book with broker counterparty framework.

Spread structure. Broker-defined spreads — typically wider than ECN raw spreads.

Commission structure. Often zero commission — broker compensation through spread.

Execution speed. Variable execution speed reflecting broker dealing framework.

Slippage characteristic. Substantially controlled slippage reflecting broker counterparty framework.

Transparency. Reduced transparency reflecting internalized execution framework.

Account minimum requirements. Substantially flexible account minimum requirements.

Market maker model represents internalized execution framework with broker-defined spread plus typically commission-free structure.

Spread comparison across models

Spread characteristic comparison:

ECN spreads. Sub-pip raw spreads on major pairs (EUR/USD typically 0.0-0.2 pips) plus separate commission.

STP spreads. Variable spreads reflecting liquidity provider conditions plus broker markup (EUR/USD typically 0.5-1.5 pips).

Market maker spreads. Broker-defined spreads (EUR/USD typically 1.0-3.0 pips) with typically zero commission.

Total cost comparison. ECN total cost (raw spread plus commission) versus STP spread versus market maker spread requires per-transaction calculation.

Volume sensitivity. ECN model substantially favorable for high-volume traders given commission structure; market maker model substantially favorable for low-volume traders given spread-only structure.

Crisis-event spread expansion. All three models experience crisis-event spread expansion with model-specific dynamics.

The spread comparison reveals substantial cost-structure differences across three execution architecture categories.

Execution quality comparison

Execution quality characteristics:

ECN execution. Substantially transparent execution reflecting market depth visibility plus electronic ECN framework.

STP execution. Liquidity provider routing execution reflecting straight-through processing framework.

Market maker execution. Internalized execution reflecting broker counterparty framework with potential conflict-of-interest considerations.

Slippage comparison. ECN variable slippage; STP variable slippage; market maker controlled slippage.

Re-quote frequency. ECN minimal re-quotes; STP variable re-quotes; market maker historical re-quote frequency reduced across modern framework.

Order rejection patterns. Variable order rejection patterns across three models reflecting execution framework differences.

The execution quality comparison reveals substantial execution-characteristic differences across three architecture categories.

Trader selection considerations

Selection framework considerations:

Trading volume framework. High-volume trader framework substantially favors ECN model reflecting commission structure favorability.

Trading style framework. Scalping plus algorithmic strategy framework substantially favors ECN model reflecting raw spread availability.

Trading capital framework. Higher trading capital framework supports ECN model account minimum requirements; flexible capital framework supports STP plus market maker accessibility.

Transparency requirement. Substantial transparency requirement favors ECN model reflecting market depth visibility framework.

Crisis-event consideration. Crisis-event consideration affects model selection reflecting execution framework dynamics during stress events.

Regulatory framework consideration. Regulatory framework (jurisdictional variation across ESMA, ASIC, CFTC, others) affects model selection considerations.

The selection framework reflects substantial trader-specific consideration variation across three execution architecture categories.

Regulatory framework implications

Regulatory framework affecting model selection:

ESMA framework impact. ESMA leverage cap framework affects all three models with model-specific implementation considerations.

ASIC framework impact. ASIC framework affects Australian broker operation across three models.

CFTC NFA framework impact. CFTC NFA framework affects US broker operation with substantially restricted model availability.

FCA framework impact. FCA framework affects UK broker operation across three models.

Multi-jurisdictional broker framework. Multi-jurisdictional broker framework supports model availability variation across regulatory jurisdictions.

The regulatory framework substantially affects broker model availability plus operational reality across geographic contexts.

Watchlist 2026

Three observable patterns through 2026:

Continued spread compression. Continued spread compression across all three models supports framework evolution.

ECN model expansion. Sustained ECN model adoption affects broker framework competitive positioning.

Crypto FX framework integration. Continued crypto FX framework integration affects model framework expansion.

The ECN vs STP vs Market Maker comparison illustrates three distinct retail FX broker execution architecture categories serving distinct trader requirement contexts. Substantial cost-structure plus execution-characteristic differences across three categories support trader selection considerations reflecting trader-specific framework requirements. For ongoing retail FX broker analysis, the three-architecture comparison provides operational reference for understanding broker model framework affecting trader selection logic.