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Read your golf miss from launch monitor numbers

Last updated: October 5, 2026

By Andrew · Founder of Fore-ward Thinking, a golfer who lives in launch monitor data and built an AI coach that remembers every session.

Launch direction and spin axis name a slice, hook, push or pull. Fat and thin are weaker reads: ball speed short of your own normal off turf points to fat, often with an iron attack angle reading up, and an iron smash too high for the club points to thin. Check the pair, then run one self check.

Figure 1 · six misses · the lead number for each one

Which two numbers name your miss?

Launch direction and spin axis name the four direction misses (slice, hook, push and pull), while the two strike misses (fat and thin) show up in ball speed, attack angle and smash factor. Direction and strike are different problems that mostly live in different numbers. The exception is a heel or toe strike, which can tilt the axis by gear effect, and that is why the strike gets checked first.

Launch direction is the start line; Uneekor and SkyTrak call it side angle, FlightScope horizontal launch angle, and Square direction. The ball starts close to where the face pointed at impact, with the path as the junior partner, so the start line is mostly a face number. Spin axis is the curve. Trackman defines spin axis as the tilt of the ball's rotational axis, relative to the horizon, immediately after it leaves the face: positive curves right, negative curves left, and in general a spin axis between minus 2 and plus 2 can be considered a straight shot. The curve is the face to path story, how far the face pointed away from the direction the club was traveling.

A fat or thin strike can start on line and fly straight, which is why the direction numbers miss it. What changes is the strike, and it shows in ball speed that comes up short of your own normal for that club, in an iron attack angle that reads up because the arc bottomed out before the ball, or in a smash factor too high for an iron. Your own baseline beats any chart here.

How do you read a slice from your numbers?

A slice reads as a large positive spin axis with a start line near the target, which is consistent with a face open to the path. On a centered strike that read is strongly inferable, because the curve is the face to path story. A ball that starts left and curves right is a pull slice, read under the pull below.

The catch is the strike. Titleist's gear effect explainer describes a heel strike curving the ball left to right and a toe strike curving it right to left, with the effect much weaker on irons and wedges than on drivers and woods. So on a driver the same two numbers can come from a contact pattern rather than a delivery, which makes strike the first thing to rule out.

Self check: foot spray on the driver face for ten balls. Heel marks mean fix the strike before chasing the face. Centered marks put the curve back on face to path.

The full slice walk through, with the three slice signatures and which units can see each one, is in fix your golf slice with launch monitor data.

How do you read a hook from your numbers?

A hook reads as a large negative spin axis with a start line near the target, which is consistent with a face closed to the path. It is the slice mirrored, with the same strongly inferable read on a centered strike. A ball that starts well right and curves back across the target line is a push hook, and one that starts left and keeps turning left is a pull hook; both are read in the push and pull sections below.

The strike caveat mirrors too: a toe strike on a driver curves the ball right to left by gear effect, so a hook can be a contact pattern before it is a delivery. How large an axis number is worth fighting is covered in launch monitor spin axis, explained.

Self check: foot spray for ten balls. Toe marks point at the strike first.

How do you read a push from your numbers?

A push starts right of the target, so launch direction reads right, and the spin axis tells a straight push from a push slice or a push hook. The start line is measured on every unit in the table further down this page. Square, for one, reads direction against the unit's own target line rather than your stance, so line the unit up with your target before you trust a push or pull.

• Straight push: spin axis near zero. On a centered strike that is consistent with face and path going right together, so the ball holds its line.
• Push slice: a positive axis, consistent with a face pointing right of the target and open to the path, so the ball curves further right.
• Push hook: a negative axis, consistent with a face pointing right of the target but closed to the path, so the ball curves back left across the target line.

Face and path going right together is strongly inferable from a straight flight on a centered strike. The face and path geometry behind each start and curve is laid out in club path and the golf ball flight laws.

Self check: for a straight push, look at where the ball sits in your stance. Ball position moves face and path together. The further back the ball sits, the earlier the club reaches it, while the arc is still working out to the right and before the face has rotated closed. Move it one ball forward and hit ten. If the start line comes back toward the target, ball position is a lever worth keeping, pending two more sessions.

How do you read a pull from your numbers?

A pull starts left of the target, so launch direction reads left, and the spin axis splits it three ways, the same as a push. The curve, or the lack of it, decides which pull you have.

• Straight pull: spin axis near zero, consistent with face and path going left together on a centered strike.
• Pull hook: a negative axis. The ball starts left and keeps turning left, consistent with a face closed to the path.
• Pull slice: a positive axis. The ball starts left and curves back right, consistent with a face open to the path.

One trap: a straight pull does not clear your grip. Grip sets the face relative to the target, while curve reads the face against the path. A grip that returns the face pointing left can land it square to a path that is also moving left, and that ball flies dead straight.

Self check: ball position again, from the other side. The further forward the ball sits, the later the club reaches it, after the path has started back left and the face has rotated closed. If yours has crept forward, move it one ball back and hit ten.

How do you read a fat shot from your numbers?

Off turf, a fat strike shows up as ball speed and carry short of your own normal for that club, because the club reached the ground before the ball. From ball data alone it is weakly inferable, since other poor strikes lower the same numbers.

A mat can hide it. The club skids off a mat into the back of the ball and posts a number worth writing down, while the same swing off turf takes the ground first and comes up short. I am a picker who fights low point and the occasional fat or thin, and my own outdoor carries run shorter than my sim carries. I put that down to bottoming out behind the ball in a way the mat hides. How the simulator models flight can open a gap of its own, and why your golf simulator reads short separates the two.

Two numbers can still give a fat low point away indoors. On an iron, an attack angle that reads up, a positive number, means the arc had already bottomed out before the club reached the ball; irons normally come in 2.5 to 5 degrees down. And some units report low point itself: Trackman's parameter definitions include low point distance, height and side, and FlightScope's Pro Package lists low point among what it adds to a Mevo+ or Mevo Gen2. Low point is inches, where the arc bottoms out. Attack angle is degrees, the direction the club is moving at the ball.

Self check: lay a towel a hand behind the ball and hit ten. Touching the towel puts your low point behind the ball; brushing the turf on the target side of it is the goal.

How do you read a thin shot from your numbers?

On an iron, a thin strike often shows up as a smash factor that is too high for the club: a 7 iron near 1.40 usually means a thin or delofted strike, not a better one. Ball speed holds while the measured club speed drops, so the ratio climbs.

For reference, a well struck 7 iron sits around 1.30 to 1.38 and a well struck driver 1.45 to 1.50. Those bands are anchored to Trackman's tour averages, where the PGA Tour 7 iron averages 1.34. Save the 1.45 and up talk for the driver.

The read is weakly inferable. A delofted strike from the center of the face can post the same high smash, and the ball data alone will not reliably separate the two. Impact location can: where your unit reports it, a pattern low on the face settles it.

Fat and thin often travel together. The same low point problem can dig one swing and catch the ball on the way up the next, so a session with both misses more likely has one cause than two.

Self check: foot spray for ten balls. Marks low on the face or on the leading edge mean thin.

What can your launch monitor see for each miss?

Every launch monitor compared on this page measures the start line, so any of them can read a push or pull; the curve behind a slice or hook, face angle, and the impact location that settles a thin shot depend on the unit and its setup. Read your row before you trust a read that needs one of those numbers.

Classifications follow the free launch monitor accuracy tool. Estimated means the tool files the number as modeled: an algorithm produces it, or the maker does not say how it is produced, so it is treated as an estimate. Derived means it is worked out from other readings rather than read directly. The Trackman indoor spin axis note is from Trackman's own spin axis page.

The strike numbers vary too. Attack angle, the indoor read on a fat strike, is not reported on the SkyTrak+, and eight of the other thirteen rows need club stickers, a club marker or a Premium membership before they report it. Smash factor, the thin read, is not reported on the Square Golf Home Edition at all. Check your row in the accuracy tool before you lean on either.

You can still read the face without a face angle number. My own Uneekor Eye Mini Lite reports none, so I read the face from spin axis against the path its stickers measure. That read holds on a centered strike; a heel or toe hit tilts the axis by gear effect on its own, so it stays an inference rather than a face number. The free launch monitor accuracy tool goes through the other core numbers on your unit, setup by setup.

How do you fix a miss one cause at a time?

Name the miss from its two numbers, pick one cause, run one drill for that cause, hit ten balls, and read the same two numbers again. Then confirm it across sessions before calling it fixed.

1. Name the miss. Read the two numbers across ten balls with one club, not off one shot.
2. Pick one cause. When a heel, toe, fat or thin pattern shows, fix the strike first, since a heel or toe hit can bend the curve on its own and fat and thin often share one low point cause.
3. Choose one drill for that cause. One intent, not a stack of swing thoughts.
4. Hit ten balls. Ten proves nothing on its own, but it outvotes any single swing.
5. Read the same two numbers. Judge the average moving toward your target number and the spread tightening, never one good ball.
6. Confirm across two or three sessions. A single session is too small to call. If the numbers do not improve, change the drill rather than trying harder at the same one.

Disclosure: I'm the founder of Fore-ward Thinking. I built Chip, our AI golf coach, to run this loop with you. It reads your ball data, interprets what the numbers say about the root cause of your miss, gives you a drill for that cause, has you hit ten balls, then reads your next session to see whether that cause improved, and gives you the next drill if it did not. It coaches from your data, not swing video. Free to start with three messages, no card required.

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