I made a progression table level 2-20 that you are now.
+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20 equal (209)
So subtracting 209 less 150, you need to do more 59 times to reach cap for Lv20.
You can check in your alt account to see better with low points required for the cap Lv max.