CAPITAL DECISION OS
Know what the trade can do to your account.
Maximelion calculates your all-in risk, checks the trade against your account and prop rules, shows what can break, and tells you what must change for the decision to fit. No signals. No execution. You decide.
No broker connection required · Deterministic calculations first · Private by default
$100,000 prop account · $5,000 daily loss limit · EURUSD · 0.90 lot · $250 trade-risk cap · 0.05% fee per side · 5 bps slippage
Demonstration with synthetic figures.
Three versioned linear USDT contracts — planned loss, exposure, estimated margin, and honest refusals for anything unverified.
17 free deterministic calculators. Every result can flow into a full check.
Daily cap, max drawdown, consistency — checked before the trade, not after the breach.
Every saved decision is designed as an append-only versioned record with a reproducible receipt. Live deployment reconstruction remains unmeasured until a saved decision exists.
One loop. Before and after the trade.
- 01Describe
- 02Check
- 03Decide
- 04Record
- 05Close
- 06Review
- 1Set the account once. Save balance, equity, risk cap and prop rules.
- 2Review in under 60 seconds. Add symbol, direction, entry, stop and size.
- 3See deterministic truth. Get risk, buffer, conflicts and compliant quantity.
- 4Decide with authority. Take, resize, delay or skip; Maxi can challenge assumptions.
- 5Close the loop. Record outcome and receive a weekly review grounded in your own decisions.
THE ENGINE
One check.Every rule.
Deterministic first: versioned formulas, all-in loss with fees and slippage, and a verdict that says what must change — all through one check. Every receipt is sealed and recomputable.
Choose how to get started
Prop Challenge
The challenge rules, checked before the trade.
- Daily cap and max drawdown checked before entry
- Challenge buffer and consistency calculators
- Payout-safety arithmetic on every check
- REDUCE verdicts carry the compliant size
Personal account
Your own rules, recorded before the market tests them.
- Two specialized desks — Forex and Crypto
- A weekly review built from your own record
- Every risk fact free, every time
- Your record sealed and exportable
Learn
Arithmetic-first guides to the questions every trader actually asks — each one ends at the calculator that runs the same math on your numbers.
How to Calculate Position Size (Formula, Example, Common Mistakes)
The position-size formula from risk budget and stop distance, one worked example in dollars, and the mistakes — rounding up, skipping fees — that quietly break it.
Read the guide →Prop Firm Drawdown Rules: Daily, Trailing, and Why Traders Fail Them
What daily loss limits and trailing drawdown actually measure, the balance-vs-equity trap, and the arithmetic of how one oversized trade ends a challenge.
Read the guide →How to Avoid Liquidation in Crypto Futures: the Leverage and Margin Math
Why liquidation price is a function of leverage and maintenance margin, an illustrated example at 10x, and why the stop — not the liquidation engine — should be the exit that fires.
Read the guide →How Much Should You Risk Per Trade? The Math Behind the 1% Rule
Fixed-fractional risk, what losing streaks do to an account at 1% versus 5%, the asymmetry of drawdown recovery, and how to turn a percentage into a rule you can check.
Read the guide →Risk-Reward Ratio: What It Is, and the Win Rate Each Ratio Requires
How to compute the risk-reward ratio from entry, stop and target, the breakeven win rate each ratio demands, and why a good ratio on a bad stop is fiction.
Read the guide →What Is the Funding Rate in Perpetual Futures — and What Does Holding Cost?
Why perpetuals pay funding at all, how to turn a small 8-hour rate into a real monthly cost on your margin, and when funding quietly decides a trade's outcome.
Read the guide →Win Rate Is Not Edge: Expectancy, Streaks, and the Numbers That Matter
Why a high win rate can lose money and a low one can compound, the expectancy formula in risk units, and the losing-streak table every win rate should be read with.
Read the guide →Money Management for Traders: a System of Five Written Rules
Money management as five written, checkable rules — per-trade risk, portfolio heat, a daily stop, a drawdown step-down, and a weekly review — with the arithmetic for each.
Read the guide →Maximelion is decision support—not financial advice.
Maximelion does not predict markets, recommend securities, guarantee profitability or prop success, hold funds, connect to execute orders, or replace your broker’s and prop firm’s official rules. You remain the decision authority.
Limitations →