Hi! is anyone can tell me-who is more accurate in counting volume from your expirience? i got this for today: my app: amat-24.67M nvls-9.62M klac-11.73M scottrade: amat-26.55 nvls-8.90 klac-11.29 yahoo: amat-32.32 nvls-10.86 klac-14.6 datek: amat-33.064 nvls-10.92 klac-14.77 i can accept difference in 0.5M on stock with 10M average, but difference between my app,scottrade and yahoo in 3M on klac-to much. any idea-which one i should use? thank you!
DATEK is the most accurate. Scottrade is always behind. I think they do not count pre-market trading. Yahoo is delayed. Datek volume is always accurate. (well, except on the days when their servers have problems, but then it is very obvious)