Does the First 30 Minutes Predict the Rest of the NQ Trading Day? — Transcript

Full transcript

1. 0:00Two NASDAQ future sessions. By 10:00 in
2. 0:03the morning, both had rallied about 207
3. 0:05points. Their opening ranges were nearly
4. 0:08the same width, too. Then, one fell 276
5. 0:12points into the close. The other gained
6. 0:15another 275.
7. 0:17Same opening, opposite endings. So, what
8. 0:20did the first 30 minutes actually tell
9. 0:21us? Across 408 sessions, it turned out
10. 0:24to say very little about direction and
11. 0:27quite a lot about something else.
12. 0:35Here's the test. Take only the trades
13. 0:37between 9:30 and 10:00 in the morning
14. 0:39Eastern Time. Measure two things: how
15. 0:41far price moved and the distance from
16. 0:43the highest price to the lowest. That
17. 0:45second number is the opening range.
18. 0:48Then, look at a completely separate
19. 0:49window, 10:00 to the close at 4:00.
20. 0:52Keeping those apart matters. If you
21. 0:54compare the opening move against the
22. 0:55whole day, the opening is already inside
23. 0:57the answer. We want to know what it says
24. 0:59about what comes next. The sample runs
25. 1:02from December 2024 through August 2026,
26. 1:05and the last 149 sessions were held back
27. 1:07to check whether anything we found still
28. 1:09held in a later period. First,
29. 1:11direction. If the opening was up,
30. 1:14predict a further rise into the close.
31. 1:16If it was down, predict a further fall.
32. 1:18That was right on 53.7%
33. 1:21of sessions, slightly better than a coin
34. 1:23flip. Except the uncertainty interval
35. 1:25ran from about 49 to 58%. It contains
36. 1:2950. So, this sample did not establish a
37. 1:32dependable directional edge.
38. 1:34That isn't an argument for fading every
39. 1:36opening move. It means direction alone
40. 1:38wasn't enough.
41. 1:45Now, look at those two days again. One
42. 1:47reversed, one continued, but both
43. 1:50covered a lot of ground after 10:00,
44. 1:52roughly 470 points and 435.
45. 1:56That's the distinction. A market can
46. 1:58travel a long way whether it finishes
47. 2:00higher or lower.
48. 2:02Across the full sample, wider opening
49. 2:05ranges tended to be followed by wider
50. 2:07remaining ranges. The rank correlation
51. 2:09was 0.55.
52. 2:11In the held-out sessions, it was still
53. 2:13positive at 0.43.
54. 2:15Those are associations, not win rates.
55. 2:18They don't tell you where price will
56. 2:19finish, but the range relationship was
57. 2:21clearer than the directional one, and it
58. 2:23survived into data the study hadn't
59. 2:25seen.
60. 2:34There's one more reason to be careful
61. 2:36with the opening high and low. In just
62. 2:39over a third of sessions, 36%, price
63. 2:42eventually broke both of them.
64. 2:44Breaking a level and following through
65. 2:46are different events. Crossing a line is
66. 2:48not by itself a forecast.
67. 2:55This covers fewer than two years, and it
68. 2:58didn't test a strategy. No entries, no
69. 3:01stops, no costs. The useful part is
70. 3:04about expectations.
71. 3:06A wide opening range was associated with
72. 3:09a wider range afterwards. An opening
73. 3:11rally or sell-off did not make
74. 3:14continuation dependable. At 10:00, the
75. 3:17open told us more about how much room
76. 3:19price might cover than about where it
77. 3:21would end up.