Thanks to 1, the ratings are calculated using the following algorithm:

    Rating = 
      (wrs_tp / maps_total) ^ (1 / 3.5) * 1.1 +
      (wrs_pro / maps_total) ^ (1 / 2.4) * 6 +
      (record_p900 / maps_total) ^(1 / 2) * 0.14 +
      (record_p800 / maps_total) ^(1 / 2) * 0.04 +
      points_avg / 1000 * 0.07 +
      points_avg_t3 / 1000 * 0.01 +
      points_avg_t4 / 1000 * 0.02 +
      points_avg_t5 / 1000 * 0.1 +
      points_avg_t6 / 1000 * 0.12 +
      points_avg_t7 / 1000 * 0.17 +
      maps_finished / maps_total * 0.01 +
      (maps_finished_t5 / maps_total_t5) ^ (1 / 1.5) * 0.05 +
      (maps_finished_t6 / maps_total_t6) ^ (1 / 1.5) * 0.15 +
      (maps_finished_t7 / maps_total_t7) ^ (1 / 1.5) * 0.24 +
      points_total / 1000 / maps_total * 0.01 +
      maps_finished_t567_p900 / maps_total_t567 * 0.06 +
      maps_finished_t567_p800 / maps_total_t567 * 0.03 +
      maps_finished_t567_pro / maps_total_t567 * 0.06