MYND Risk-Based Position Size Calculator [v1.5]

MYND Risk-Based Position Size Calculator [v1.5]

A standalone position-sizing calculator with 3 selectable risk philosophies - Fixed % Risk, Van Tharp R-Multiple/Expectancy, and Kelly Criterion - plus an optional Break-Even Trigger, a 3-tier Partial Profit-Taking Ladder, a Losing-Streak Survivability estimate, a Risk:Reward Ratio readout, live milestone status tags, a live P&L row, and a ladder allocation check.

WHAT IT DOES

Answers "given my account, my entry, my stop, and my chosen risk philosophy, how many shares/contracts should I actually put on" - a calculator, not another chart signal.

HOW IT WORKS

Fixed % Risk is the industry-standard baseline: position size = (Account Equity x Risk%) / Stop Distance. Van Tharp R-Multiple/Expectancy uses the same math but gates it on a positive Expectancy first, computed from your own supplied Win Rate / Average Win (R) / Average Loss (R) via Van Tharp's textbook formula. Kelly Criterion computes a dynamic risk% from your supplied Win Rate and Win/Loss Ratio using the classic f* = p - q/b formula, applied within the same stop-distance sizing formula (a disclosed practitioner adaptation, not a literal full-bankroll wager), with a Kelly Fraction Multiplier (Half-Kelly by default) on top.

This tool has NO access to your actual trade history - it is not a strategy backtester. The Van Tharp, Kelly, and Losing-Streak Survivability inputs are numbers you supply from your own trading record.

KEY FEATURES

A live dashboard showing every step of the calculation, including live status tags and P&L. A Max Position Size safety cap always applied on top of whichever mode's raw output. Up to 7 reference lines plotted directly on the chart, each with an optional price label. Full Total Control, Light/Dark/Custom theme plus a Colorblind-Safe Okabe-Ito palette, full tooltip coverage on every non-obvious setting, and Combo Alert Bundling.

HOW TO USE IT

Set your Account Equity, Direction, Entry Price, and Stop Method. For an actual open trade, set a fixed Entry Price so Live P&L and the [REACHED] tags mean something. Start with Fixed % Risk if you don't have reliable win-rate/R-multiple stats yet. Check the Risk:Reward Ratio and Ladder Allocation Check rows as quick sanity checks. Turn on the Partial Ladder if you scale out of positions, and the Break-Even Trigger if you follow a move-to-break-even habit.

SETTINGS WORTH TUNING FIRST

Account Equity + Risk % of Equity Per Trade. Max Position Size (% of Equity). Entry Price - fixed vs. 0/live close. Risk % Warning Threshold. Partial Ladder Tier R-Multiples/%. Milestone Status Lookback (bars) - increase for trades held longer than 100 bars.

ALERTS

11 individual alertcondition()s (Negative Expectancy Warning, No Kelly Edge Warning, Position Capped by Max Size, Zero Stop Distance Warning, High Risk % Warning, Ladder Over-Allocated Warning, Break-Even Trigger Reached, Take-Profit Target Reached, Partial Ladder Tier 1/2/3 Reached) plus 2 combo bundles (ALL Risk Warnings, ALL Trade Management Milestones).

This tool does not evaluate whether any trade is a good idea - every number is a mechanical consequence of the inputs you provide, and the Van Tharp/Kelly/Streak-Survivability inputs are only as good as your own supplied historical stats. This tool is provided for informational and educational purposes and does not constitute financial advice. Trading involves risk; past performance and historical patterns do not guarantee future results.