Most broker comparisons focus on the number that's easiest to advertise: the spread. But if you're running an Expert Advisor or copying a strategy, spread is only one input in a much longer list — and often not the one that determines whether your live results match your backtest.
Execution Speed Matters More Than the Spread You See
A quoted spread is what you see on the price feed. What actually fills your order depends on execution speed and the broker's order-routing model. An EA built on 20-pip breakout logic can lose most of its edge to a few hundred milliseconds of latency during a fast move — the exact moments a breakout strategy is trying to catch.
Before committing capital, test execution on a demo account during your strategy's most active session. Compare the price at signal time to the actual fill price over a few dozen trades. That gap is your real cost, not the number on the broker's homepage.
Check Slippage During News, Not Just Quiet Hours
Spreads look tight in quiet market conditions almost everywhere. The real test is what happens during a news release or a session open, when liquidity thins out. If your framework includes a news filter — as it should — this matters less. But any trades that do execute near volatility spikes will show you a broker's true slippage behavior far better than a marketing page will.
VPS Compatibility Isn't Optional for 24/5 Systems
An EA that only runs while your laptop is open isn't really automated — it's a chart indicator with extra steps. Confirm your broker's platform performs reliably on a low-spec VPS: connection stability, reconnect behavior after a dropped session, and whether the broker's own terminal has any known memory-leak issues on 24/5 uptime are all worth checking before you commit.
- Reconnect behavior: does the terminal resume cleanly after a VPS reboot or brief outage?
- Server location: a VPS geographically close to the broker's server reduces round-trip latency.
- Terminal stability: some MT5 builds behave differently under 24/5 load than in a quick demo session.
Read the Swap and Rollover Policy Before You Backtest Around It
Swap rates vary meaningfully between brokers and can quietly erode a strategy that holds positions overnight. If your Strategy Tester results don't account for your actual broker's swap schedule, your live equity curve will diverge from the backtest in a way that has nothing to do with your entry logic.
Regulation Tells You What Happens If Something Goes Wrong
Regulatory status doesn't affect your day-to-day execution, but it matters the day something does go wrong — a withdrawal dispute, a platform outage during a big move, an account issue. Check which regulator (if any) covers the entity you're actually opening an account with, not just the brand name on the homepage.
None of this replaces due diligence on your own strategy. But a strategy validated on clean backtest data and then run on a broker with poor execution, thin news-time liquidity, or unfavorable swap terms will underperform for reasons that have nothing to do with the logic itself — which is exactly the gap most traders misdiagnose as "the strategy stopped working."