MT4 vs MT5 for Prop Firm Trading (2026)
Last updated: July 2026. Most traders never choose the platform directly — the prop firm picks it for you. Here's what that choice actually changes.
The practical differences
| MT4 | MT5 | |
|---|---|---|
| Asset coverage | Forex-focused | Multi-asset: forex, indices, commodities, crypto |
| Timeframes | 9 | 21 |
| Pending order types | 4 | 6, including Buy/Sell Stop Limit |
| Backtesting speed | Single-threaded, slower | Multi-threaded, roughly 5–10x faster |
| News-event stability | Prone to freezing/lag during high-impact events | Stays more stable under load |
| 2026 industry volume share | ~46% | ~54% |
The one real reason to still want MT4
Expert Advisors and custom indicators built for MT4 don't run on MT5 — the platforms use different programming languages entirely. If you have an existing MQL4 strategy or EA you rely on, that's the one legitimate reason to prioritize an MT4-supporting firm over MT5, not platform quality itself.
Why MT5 is the default recommendation otherwise
For a trader starting fresh with no legacy MT4-specific tooling, MT5 wins on essentially every measurable dimension — more timeframes, faster backtesting, better performance during volatile news events, and broader asset access if you ever want to trade beyond forex. FTMO runs on MT5 (see our FTMO vs The5ers comparison), consistent with the broader industry shift away from MT4.
Why this matters for firm selection
If platform capability matters to your strategy — say you backtest heavily, or trade around high-impact news — check which platform a firm runs before comparing profit splits or pricing. A firm with slightly worse economics but a platform that actually handles your trading style well can outperform a "better deal" on paper.
Bottom line
Unless you have an existing MT4-specific EA to preserve, there's little reason to prioritize MT4 over MT5 in 2026 — check platform support as an early filter, not an afterthought, especially if you rely on backtesting or trade through high-volatility news events.