Don't take my words for advice but I think Options expiry seems to be the even bigger trading signal.
In the most simple way I can explain is this: options expire on a certain date, no matter what the price is, and the price on these contracts are fixed, let's say Price A. Meanwhile, actual price is of course never Price A, since contracts expire in future. Lets call this Price B. Price B will always "rush" towards Price A when options expire. It seems:)
Thanks for the tip! I appreciate it and am going to investigate further.