Position Sizing Calculator — Risk Management
Fincai's position sizing calculator helps you decide how much to put into any single stock or options trade based on the risk you are willing to take. Instead of guessing a share count, you work back from your account size and the loss you can accept to a disciplined, repeatable position size.
Consistent sizing is one of the most reliable ways to survive losing streaks and let winners compound. The calculator pairs naturally with Fincai's stop-loss rules and the autonomous strategy runner, which enforces position and notional caps at entry.
Position sizing turns risk management from an afterthought into a rule. By starting from your account size and the maximum loss you are willing to accept on a trade, and combining that with a defined stop, you arrive at a share count that keeps each position proportional rather than emotional. That same discipline is what the autonomous strategy runner applies mechanically: it re-checks position and notional caps against the live price at entry and enforces the stop-loss, profit-target, and trailing-stop rules you set.
The calculator sits alongside Fincai's other risk tools — the Value at Risk calculator for portfolio-level downside and the psychology tracker for the behavioral side of discipline — so you can size a single trade, understand its contribution to overall risk, and hold yourself to the plan. It is a planning tool for your own decisions, not personalized financial advice.
Fincai is a software tool for market analysis and order entry. It is not an investment adviser, broker-dealer, or financial planner. Nothing Fincai produces is personalized investment advice, a recommendation to buy or sell any security, or an offer or solicitation of any kind. Fincai does not consider your financial situation, investment objectives, tax position, or risk tolerance.
Trading involves substantial risk, including the possible loss of the entire amount invested. Options carry additional risk and are not suitable for every investor. Before trading options, review the Options Clearing Corporation's disclosure document, Characteristics and Risks of Standardized Options.
Fincai is for informational purposes only and is not a registered investment adviser. It does not provide personalized financial advice. Trading stocks and options involves risk, including the possible loss of principal.
Not affiliated with or endorsed by Robinhood Markets, Inc.
- Size trades from your account size and risk tolerance
- Turn a max acceptable loss into a share count
- Keep risk consistent across every trade
- Pairs with the VaR calculator and psychology tracker
- Pairs with stop-loss rules and runner position caps