I am currently doing a solar tracker project. Can I use the LDR as position sensor by detecting the sunlight intensity? I mean if light intensity on LDR east is greater than LDR west, the LDR east will send a data to microcontroller and tell the motor where the sun now and rotate to that position.
You already answered your own question: yes it is possible. The question that remains is whether it is the best option. LDR's tend to foul and get less reliable, especially when used outdoors. Also the object that you are tracking (the sun) tends to be very predictable. At noon it will be at the same point in the sky each day. If you have a clock you do not need to actively track the sun with sensors. Depending on your geographical location the height of the sun over the horizon may vary each day, but also this is very predictable.