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Best S&P 500 (US500) Expert Advisor for MT5: Eudora Altair
The S&P 500 cash CFD on M15. A decision model of about 800 trees reads 50 market measurements every minute and decides which dip gets an order. Most of them it lets go.

Why Eudora Altair
Not every dip deserves an order. Altair knows which ones to let go.
The S&P 500 cash CFD on M15. A decision model of about 800 trees reads 50 market measurements every minute and decides which dip gets an order. Most of them it lets go.
The numbers
Eudora Altair trades the S&P 500 CFD on M15. About 800 decision trees decide which dip gets an order. Real-tick backtest 2021-2026: Balanced +1,155%, Extreme 256x.
How it works
The model: About 800 decision trees trained on eight and a half years of S&P 500 data, the 2020 crash included.
50 measurements a minute: Price against moving averages on M15 and daily, the decline from recent highs, volatility versus normal, RSI, stochastic, CCI, Bollinger, hour, weekday and spread.
Selective entry: Most dips are let go. The engine keeps out when the answer is no, and shows you the decision on the chart.
Targets that grow with depth: Baskets of up to eight steps where the profit target grows with depth, instead of closing deep baskets at the same distance as shallow ones.
Pick your mode
Safe. The lightest size: +222% in five and a half years.
Balanced. The default: +1,155% in the backtest.
Aggressive. +4,528%: the same engine, three times the size of Safe.
Extreme. The deposit ended 256 times larger.
Showcase. The maximum size, without equity protection. For the tester.
Proof that holds
Backtests on real ticks, M15, January 2021 to July 2026: consistent monthly profitability across modes, on several brokers' feeds.
A longer 2018 to 2026 test, the 2020 crash included, with one protection event in December 2018.
Each release is checked against a reference engine trade by trade.
Questions and answers
What does Eudora Altair trade?
Eudora Altair is an Expert Advisor for MetaTrader 5 that trades US500 on the M15 timeframe. Not every dip deserves an order. Altair knows which ones to let go.
How was Eudora Altair tested?
MT5 Strategy Tester, real ticks, US500 M15, January 2021 to July 2026, 1,000 USD, leverage 1:500 Backtests do not predict future results.
Where can I see Eudora Altair live results?
On a public MQL5 signal, where growth and drawdown are calculated by the platform and not by the seller.
What do I need to run Eudora Altair?
S&P 500 cash CFD (US500, .US500Cash, SPX500 or similar), M15 chart; From 500 USD; 2,000 USD if the broker's minimum lot is 0.1 (3,500 USD for Safe); Leverage 1:100 or higher; VPS recommended
Which mode should I start with on Eudora Altair?
Safe: The lightest size: +222% in five and a half years. Balanced: The default: +1,155% in the backtest. Every mode has its own real-tick figures on this page.
Engines mentioned in this guide
- How to choose a forex Expert Advisor for MT5
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