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Checking the market clock
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Profit, loss and percent calculator

Every example below is priced from NVIDIA's newest trading day, with $100,000 in virtual money to practice on. No sign-in.

How it works: Enter how many shares or coins you bought, the price you paid and the price you sold at. It shows the profit or loss in dollars and as a percent.

Market replay

Replay any of the last five trading days

Any US stock or fund, minute by minute, at up to 10xPro
A market replay session on JagSim: NVIDIA on Friday, November 6, 2026, 50 shares bought at $188.92 at 10:44 AM, the chart paused at 10:50 AM with the day's result so far

Market replay is part of Pro. Buy and sell a past day as it happened, step a minute at a time, and see your result at the close.

What if I had invested

Worth todayLoading the price history
Practice this trade with $100,000 in virtual money

Market hours

Is the stock market open today?

Checking the market clock
Reading the market calendar

What are the stock market hours? Regular session 9:30 AM to 4:00 PM ET, Monday to Friday; pre-market from 4:00 AM, after hours to 8:00 PM. When does the stock market close early? At 1:00 PM ET on the days marked above. i

Keep going

Keep what you practice

A free account saves trades, portfolio and replays. 7-day free trial of Pro, no card.

$100,000in virtual money on day one
Real-timeprices on every chart and order
Freeforever, no card to start

Sizing and risk

Position size

Shares to buy
Position
Practice this trade

Risk to reward

Risk to reward
Break-even win rate i
Practice this trade with $100,000 in virtual money

Average cost and break-even

Average cost
Break-even price i
Practice adding to a position

Returns

Profit, loss and percent

Compound growth

Dividend reinvestment

Dividends reinvested
Dividends taken as cash
Practice a dividend portfolio

Educational tools, not investment advice. JagSim is a simulator, not a broker. The replay day is stored after each close; the stop-loss share calculator has its own page too.