What is Spread in Forex? Cost of Every Trade Explained
What is spread in forex and why does it eat your profits? Learn how the bid-ask spread works, fixed vs variable types, and what it means for your strategy.
Read →Nebula · journal
Trading tools
What is MetaTrader? MT4 vs MT5 Explained
New to trading platforms? Learn what MetaTrader is, how MT4 and MT5 differ, and which platform suits your trading style. Clear, no-fluff breakdown.
Read →What is Forex Trading? A Beginner's Complete Guide
New to currency markets? Learn what forex trading is, how pairs work, who the players are, and what actually moves prices - all in plain English.
Read →What is an Expert Advisor in Forex? Auto-Trading 101
New to automated trading? Learn what an Expert Advisor is, how it works in MT4/MT5, and what to check before buying one. Auto-trading 101.
Read →What is Drawdown in Trading? The Most Important Number You Ignore
Drawdown is the peak-to-trough drop in your account equity. Learn how to calculate it, why it matters more than total return, and what level is too high.
Read →What is a Lot Size in Forex? Standard, Mini, Micro Explained
A lot is the unit of trade size in forex. Learn what standard, mini, micro and nano lots represent - and how to pick the right size for your account.
Read →How to Choose a Forex Broker: 2026 Checklist
Choosing a forex broker is the most consequential decision you'll make before live trading. Here's a 10-point checklist that filters the legit from the preda...
Read →What is Leverage in Forex? Plain English Guide
Leverage lets you control a larger position than your account size. Here's how forex leverage actually works, what 1:100 means, and the trap most beginners f...
Read →Overfitting in Algo Trading: How to Spot It Before It Burns You
Overfitting is why most beautiful backtests die in live trading. Here's how to recognise it, the tests that catch it, and the design choices that prevent it.
Read →Stop Loss vs Trailing Stop: When to Use Each
A fixed stop loss caps your downside. A trailing stop locks in profit as price moves. Here's exactly when each one earns its keep - and when it costs you.
Read →What is a Pip in Forex? A Beginner's Guide
A pip is the standard unit of price movement in forex. Learn what a pip is, how pip value is calculated, and why this number drives every trade you take.
Read →Forex Position Size Calculator: How to Trade With the Right Lot Size Every Time
Your trading edge means nothing if your position size is wrong. Get the lot size right and a 50% win rate compounds an account. Get it wrong and the same str...
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Put a tested system on your own MetaTrader.
Nebula searches, stress-tests and grades trading systems on your own machine - then deploys the survivors to MT4 or MT5. The free tier is the full engine, forever.
Or browse the ready-made systems library →
- Free tier, no card - build, test and make one real deploy before you pay anything
- Runs on your own PC or Mac - your MT4/MT5 account stays with your broker
- 14-day cooling-off on any purchase before activation, in line with UK consumer law
- A real person answers - Ross, the founder, via contact or Discord
- Real reviews - Nebula on Trustpilot
Reviews on Trustpilot: Nebula & tools (Orion RFX) · private mentoring (Pip Surfing Society) · Trading carries risk; past performance does not guarantee future results.