Hi, I'm really bad with plants. I have a potted olive tree in Ottawa Ontario. It's probably 4 years old. This winter, after I brought it indoors, it lost about 95% of it's leaves. Only a small bunch of leaves (maybe like 30 leaves) on one branch were left. Now some new leaves are growing but they are starting to curl. I don't know what to do. My water meter always show it's moist in this soil even when it isn't. (I don't understand why, like it could be bone dry and the meter will show "wet"). So I check with my fingers. There is no pest that I can see. Any help would be greatly appreciated. I uploaded a picture of some old and new leaves.