Day trading: what it actually takes

Day trading means every position is closed before 4:00 PM ET. No overnight risk, and no gap against you at the next open. A gap is when a stock opens far from where it closed, often after news. In exchange, you compete with the fastest money in the market, so your edge has to come from discipline, not speed.

The account rule to know first

Starting in 2001, FINRA's pattern day trader rule said that four or more day trades inside five business days in a margin account, one that lets you borrow from your broker, required at least $25,000 in equity. FINRA replaced that rule with new intraday margin standards, effective June 4, 2026. They drop the $25,000 minimum and the day trade count. Brokers have until October 20, 2027 to switch over, so yours may still apply the old rule. Ask before you plan around it.

Cash accounts never had the rule, but money from a sale must settle before you can freely reuse it. US stock trades settle one business day after the trade, called T+1. Buying and quickly selling again with unsettled money can get a cash account restricted.

A simple structure to start with

Trade liquid names only. Stocks and ETFs that trade millions of shares a day, with a spread of a penny or two. The spread is the gap between the highest price a buyer offers and the lowest price a seller accepts. Thinly traded names fill you at bad prices on the way in and worse on the way out.

Let the first 15 minutes set the range. The high and low of the first 15 minutes after the 9:30 AM ET open are the opening range, the first levels that matter. A clean break above the high on heavy volume, meaning more shares changing hands than usual, is a long setup, a setup to buy. A break that falls back inside the range is a warning.

Risk a fixed slice. 0.5% of the account per trade is plenty. On $30,000 that is $150. Set the stop at the other side of the range, then size so the stop costs $150. Say the range is $49 to $50 and you buy the break at $50. A stop at $49 is $1 away, so $150 divided by $1 is 150 shares.

Have a daily loss limit and obey it. Two losing trades or an account down 1.5% on the day, whichever comes first, and you are done for the day. The worst days in a trading account almost always come after the limit was ignored.

What to track

Win rate matters less than average win versus average loss. A 40% win rate with winners twice the size of losers comes out ahead before trading costs. Over 10 trades risking $150 each, 4 wins of $300 make $1,200 and 6 losses of $150 cost $900, a net gain of $300. A 70% win rate with one uncontrolled loss can erase a month. The public record on this site shows the win rate next to the average result for the same reason.

Try this

For one week, paper trade only. Each morning, mark the 15-minute opening range on one heavily traded stock or ETF you follow. Write down where a break would trigger, where the stop would go, and the share count that risks $150 on a pretend $30,000 account. On Friday, total the paper results in dollars and count how many days you would have hit the loss limit.