Most traders see the chart. Astro shows the money behind it.

Big bets on the tape, explained in plain English.

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Astro Flow · flagged 1:38 PM ET

AAPL 335 calls, 10/12

Calls bought at the ask · $2.05 · 18x open interest

Betting up

+109.8% peak since flagged

Real past flow marker · Fri, Oct 9

Not a regular flow tool.

Polaris trade plans, with the flow and the chart read behind every one.

Recent highlights

Selected Astro Flow markers, –

GEV 900 calls, 10/30

· 10:02 AM ET

218 calls bought at the ask, 2x open interest.

Flagged
$3.50
Peak · 12:17 PM
$16.00
Close
$9.40
Peak since flagged
+357.1%

  1. TSLA 392.5 puts, 10/26

    · 2:22 PM ET

    +405.0%peak since flagged

    Flagged $0.40 · Close $1.13

  2. MU 980 calls, 10/28

    · 2:35 PM ET

    +356.4%peak since flagged

    Flagged $2.36 · Close $4.50

  3. INTC 64 puts, 10/30

    · 12:00 PM ET

    +248.4%peak since flagged

    Flagged $0.31 · Close $0.01

  4. SNDK 1130 puts, 10/30

    · 1:23 PM ET

    +243.8%peak since flagged

    Flagged $5.60 · Close $0.05

Selected flow markers, not all of them. Peak since flagged compares the highest traded price after a marker with its price when flagged; it is not a trade result. A dashed stretch had no trades; the green bracket marks trading near the peak.

How it works

Reading the options tape used to take a trading desk, an expensive data feed and years of practice. Astro does the reading for you.

  1. Step 1

    Astro reads the tape

    What was bought, how aggressively, and how it compares to open interest.

  2. Step 2

    You get a Polaris trade plan

    The mission, the flow marker behind it, and the chart.

  3. Step 3

    You decide

    Every mission comes with the why. You stay in charge.

Ask Astro about any flow or any chart.

Astro checks its answers across several AI models. Join the waitlist to try it.

Already on the waitlist? Open Ask Astro

AstroChecking access…
  1. Example

  2. You: What does it mean when the flow and the chart agree?

  3. Astro: Flow is where big traders are putting money in options, like a run of large call orders on one stock. The chart shows where the price sits against its key levels, like holding above the day's average price. When both point the same way, Astro posts a play and shows you both.

Checking access on this device…

Join the waitlist to ask Astro 2 questions a day.

Join the waitlist

Answers trading questions only.

Built and refined by a professional trader

Four inputs. One Polaris trade plan.

No signal is read in isolation. Astro speaks up only when the chart, the flow, the market and relative strength agree.

The chartKey levels and trendlines.
Flow, filteredBig-money bets. The noise thrown out.
The whole marketIs the market helping or fighting the move?
Relative strengthLeading the market or lagging?
Polaris trade plan

One mission, only when they agree.

  • The mission
  • The chart read
  • The Astro Flow behind it

Everything you need to know, in one place.

Options flow, filtered

Big buyers are betting this stock goes down

Market internals

Most stocks are falling. The market leans weak.

Social sentiment

Chatter on this stock turned bearish this morning

Illustrative examples of the signals Astro explains.

Questions people ask first.

I've never traded. Is this for me?

Yes. We explain the terms as we go. Start with our short guide to puts.

What does it cost?

Early access is free, and you don't need a card. We're in a private beta, letting a few people in at a time.

Does Astro trade for me?

No. Astro posts Polaris trade plans and the flow behind them. You place your own trades.

How often will I hear from you?

Missions post as Astro finds them, during market hours. There's no set number a day.

How do I stop notifications?

Turn them off any time in the app's Settings.

How do I add Astro to my iPhone home screen?

You can put Astro on your iPhone home screen so it opens like an app. It takes about a minute.

  1. Open the Astro web app link in Safari.

    Illustration of an iPhone with Safari open on the Astro web app. The address bar at the bottom of the screen is highlighted.
    Step 1 (illustration)

  2. Tap Share. On newer versions of iOS, tap the ••• button next to the address bar first, then tap Share.

    Illustration of Safari with the three-dot button next to the address bar highlighted. A menu is open above it with Share highlighted.
    Step 2 (illustration)

  3. Scroll down and tap Add to Home Screen. Don’t see it? Tap View More.

    Illustration of the iPhone share menu. The Add to Home Screen option is highlighted, with View More below it.
    Step 3 (illustration)

  4. Leave Open as Web App turned on, then tap Add.

    Illustration of the Add to Home Screen page. The Open as Web App switch is on and highlighted, and the Add button in the top right corner is highlighted.
    Step 4 (illustration)

  5. Open Astro from the new icon on your home screen.

    Illustration of an iPhone home screen with the new Astro app icon highlighted.
    Step 5 (illustration)

Good to know

  • Using Chrome? It works there too. Tap Share, then Add to Home Screen.
  • Want notifications? They only work when you open Astro from the home screen icon, not from a browser tab.

Having trouble?

  • No “Add to Home Screen” option? You may be in a Private tab. Switch to a normal tab and try again.
  • Opened the link from Instagram, WhatsApp or another app? That opens a small browser inside the app, and it can’t add Astro to your home screen. Tap the app’s menu, choose Open in Safari (or open Safari and paste the link), then start again at step 1.

The edge used to be access. Now it's intelligence.

Join the waitlist and be the first to hear when early access opens.

Free to join. No card needed. Leave the waitlist anytime.