Every feature, with a demo you can try.

The tape

Big prints from across the market land here, newest first.

• Each row shows the ticker, dollars, rank and venue.
• Filter by rank, venue or your favorites.
• Select a row to open its chart at that moment.

Prints arrive 15 minutes after they trade.

Prints arrive as they are reported to us.

Print ranks

See whether a trade is ordinary or one of its ticker's largest since 2016.

• Every big print gets two numbers, dollars and rank. Under the chart, Prints on this chart lists the ones in view, by rank or by time.
• Ranks compare a ticker with its own past trades, by dollar value.
• The size ladder shows what it takes to reach each rank on that ticker.
• Prints · Show 10 draws the ten best-ranked prints in the part of the chart you're looking at. Pick Show 5, Show 20, Show 50 or Show all.

Ranks are all-time for this ticker, since 2016: they use each ticker's history from January 2016, or from its first covered day if later. Prints outside the all-time top 100 show without a rank number.

Read more: How big is big: rank and percentile · Top 0.1% in the glossary

Print types

Four print types, drawn by one short rule.

• Shape is the kind: circles are regular prints and diamonds are Sweeps.
• Color is the venue: one color for Lit, on an exchange, another for Dark.
• Size and number are the rank: a 3 is the ticker's 3rd-⁠largest print.
• Where prints share a spot, the biggest is drawn with a doubled outline in its own color.
• Late Reports, Ghost Prints and Recurring Blocks are named in the tooltip.

Read more: Lit and Dark prints · Regular prints and Sweeps

The print key

One press explains every mark on your chart.

• Press K, or Key in the chart's control bar.
• Each mark sits beside its meaning, with the kinds in view listed first.
• This ticker's size ladder shows the dollars each rank starts at.

Dark Levels

See the price zones where heavy off-exchange volume built up.

• Each level has an all-time rank for its ticker, by Dark dollars since 2016. Ranks go to 100; smaller levels show without a rank.
• Levels · Show 3 draws the three best-ranked levels in the price range you're looking at and labels the #1; point at another line to see its rank. Pick Off, Show 5, Show 10 or Show 20.
• A Revisit alert tells you when price comes back to a ranked level.
• A Level Break alert tells you when price moves clearly through a level ranked #1 to #20 on heavy volume.

A Dark Level records where trading happened. It says nothing about where price goes next.

Read more: Dark Levels, explained · How levels are found

Dark Profile

See where Dark dollars traded, by price, beside the chart.

• Dark Profile shows Dark dollars by price beside the chart, stacked by session. Press D.
• Its three biggest prices are marked DL1 to DL3, tagged at the left edge like the L levels.

The profile records where trading happened. It says nothing about where price goes next.

Market Top 10

Today's ten largest single trades across every stock and ETF we cover.

• The list updates as bigger trades land.
• Each row opens the chart at that trade.
• On the chart, the trade's label shows its place as “Market Top 10 · #3 today, across the market”. That is its place in today's list, not its rank for the ticker.

Favorites

Keep your tickers in view, each with today's change and the all-time rank of its last ranked print.

• Add a ticker with the star or from search.
• A badge like #4 is the all-time rank (since 2016) of the ticker's most recent ranked print; New marks a ranked print today.
• Rows stay put while you read, even as prints land.

Market and sectors

See the broad market and all 11 sectors beside your chart.

• SPY, QQQ, IWM and DIA, plus the 11 sector ETFs.
• Each tile shows today's change and the all-time rank of its last ranked print.
• Compare draws a ticker against its sector ETF from the same start.

Alerts

Every alert opens the chart at the moment it fired.

• Build a rule from plain parts, like ticker, rank and venue.
• Alert on an Order Cluster, a Revisit or a Level Break, moments the chart does not mark.
• Or type it in your own words with the plain-language builder.
• Each alert shows when the trade happened and when we sent it.

Alerts carry the same 15-minute delay as the chart.

Alerts use the same real-time data as the chart.

Alerts can arrive late or not at all.

Read more: A calm way to watch the tape · Alert delivery by plan

Since you last looked

One card shows what changed on your tickers while you were away.

• Biggest first, covering up to the last five sessions.
• Each item jumps the chart to its moment.
• Mark everything seen and the card says you're caught up.

Chart studies

Add the classic studies you know to the same big chart.

• Moving averages, VWAP and bands sit on the price.
• RSI and MACD get their own panel under the chart.
• Change lengths and settings from the Studies menu.

Studies are calculations on past price and volume.

Split charts

Watch up to 6 charts on one screen on Big (Free: one chart).

• Pick a split from the layout button: two side by side, 2 by 2, up to 6 on Big.
• Each chart keeps its own ticker and timeframe. Link timeframes or the crosshair when you want them together.
• Drag a divider to resize. Free shows 1 chart; Big and Bigger up to 6.

The chart menu

Right-click the chart for what you can do at that spot.

• On a mark: open its details, set an alert on prints like it, or copy a link.
• Anywhere: set an alert at that price or copy the price.
• On a phone, press and hold the chart. On a keyboard, press Shift F10.

Chart themes

Give the chart its own look, apart from the page.

• Classic, Mono, Blue and orange, High contrast, Midnight and Paper.
• Blue and orange keeps rising and falling candles apart without red and green.
• Marks keep their shapes and numbers in every theme, and Lit and Dark stay two distinct colors.

Choose a chart theme from the chart menu, Layers or Settings → Appearance.

Data state

Always know how fresh the data is.

• A chip on every screen shows the state and the last update.
• If updates stop, the chip says Stale and shows when they stopped.
• On a quiet day, the chip says No unusual activity.

Read more: Delayed and real-time data

Ratings

See how stocks rank on past price performance and reported results.

• Strength ranks past-year price performance from 1 to 99.
• Earnings Score and Quality Score describe reported results.
• Group Rank shows where an industry group ranks by recent price change.

Ratings describe past data. They are not forecasts or recommendations.

Gamma Levels

See estimated price levels built from open options contracts.

• Four lines show the flip, the call wall, the put wall and the king node.
• Each comes from a model that uses prior-day open interest.
• A wall marks the strike with the most estimated gamma. It isn't a ceiling or a floor.

Estimate. Uses prior-day open interest and an assumed dealer position.

Light, dark and Retro

Pick the look that suits your screen.

• Light is warm paper and black ink, with blue and pink.
• Dark sets the same marks on a dark ground for evenings.
• Retro turns BigTape into an early-⁠1980s quote terminal, with its own sounds.

Choose a theme in Settings → Appearance.

Keyboard and touch

Get around with a few keys on a computer, or simple gestures on a phone.

• Press / to search and ? to see every shortcut.
• Press N and P to step through prints.
• On a phone, tap any mark to open its details.