SizeRight

The position size calculator that ensures you never risk more than you should. A Chrome extension built for disciplined traders.
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Created byProfile pictureSPARTAN
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SPARTANProfile picture@spartanking47·May 5
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SPARTANProfile picture@spartanking47·Apr 20

The #1 Reason Traders Blow Accounts (And the 10-Second Fix)

It's not bad entries. It's not even bad timing.


It's position sizing.


Most traders I know — beginners and experienced ones — either:

  • Risk way too much on "high conviction" plays (then get stopped out and lose 5-10% in one trade)

  • Guess their size instead of calculating it

  • Skip the math entirely because it's tedious mid-session


I built SizeRight because I wanted a tool that gives me speed without sacrificing quality, something that would give me a head-start while being professional.


Here's what proper position sizing actually looks like:


You have a $10,000 account. You want to risk 1% per trade ($100). Your entry is $150 and your stop is $145 — that's a $5 risk per share. So you buy 20 shares. Not 50. Not 100. Twenty.

As a matter of fact, it is not even 20, it is 19.28 shares. Why? The answer is simple: Fees! And this is how you risk exactly 100$


That one tweak in calculation is the core of correct risk managing, and the difference between professionals who lose exactly their risk, and those with whacky losses.


SizeRight does this instantly, right in your browser. No spreadsheet, no mental math, no "I'll just round up."


If you're serious about staying in the game, this is the most boring but important edge you'll ever have.