function myFunction() {

  var timestamp = new Date();
  Logger.log(timestamp);

  // Define parameter ranges and increments.
  var WTmin = 0.3055,  WTmax = /*0.3215*/0.3055,  WTinc = 0.0010,
      FTmin = 0.1370,  FTmax = 0.1630,  FTinc = 0.0010,
      LLmin = 0.0700,  LLmax = /*0.1200*/0.0700,  LLinc = 0.0010,
      HHmin = 0.2050,  HHmax = /*0.2450*/0.2050,  HHinc = 0.0010,
      CBDmin = 0.0650, CBDmax = /*0.1150*/ 0.0650, CBDinc = 0.0010,
      count = 0;
  var check = [];

  // Loop through all of the combinations
  for (var WT = WTmin; WT <= WTmax; WT += WTinc) {
    for (var FT = FTmin; FT <= FTmax; FT += FTinc) {
      for (var LL = LLmin; LL <= LLmax; LL += LLinc) {
        for (var HH = HHmin; HH <= HHmax; HH += HHinc) {
          for (var CBD = CBDmin; CBD <= CBDmax; CBD += CBDinc) {
            count++;
            check.push(FT);
          }
        }
      }
    }
  }
}

[15-09-02 19:20:58:047 PDT] count: 26
[15-09-02 19:28:58:506 PDT] check: [0.137,0.138,0.139,0.14,0.14100000000000001,0.14200000000000002,0.14300000000000002,0.14400000000000002,0.14500000000000002,0.14600000000000002,0.14700000000000002,0.14800000000000002,0.14900000000000002,0.15000000000000002,0.15100000000000002,0.15200000000000002,0.15300000000000002,0.15400000000000003,0.15500000000000003,0.15600000000000003,0.15700000000000003,0.15800000000000003,0.15900000000000003,0.16000000000000003,0.16100000000000003,0.16200000000000003]