Bangle.js 2 Cutting Edge - new heart rate algorithm

To set constraints of graph with min/max...

let nonCircVals = [];
    let min = 40000;
    let max = -40000;
    //circular to non-circular.
    for ( let i = 0; i < windowSize; i++ ) {
      let v = vals.obj[(tick + 1 + i) % windowSize];
      if ( v < min ) min = v;
      if ( v > max ) max = v;
      nonCircVals.push(v);
    }
    print(`min is ${min}, max is ${max}`);
    //black
    require("graph").drawLine(g, nonCircVals,{axes:false,miny:min,maxy:max,gridy:(Math.abs(max-min))/8});

The heartrate.c implementation also applies a band pass filter, which greatly helped before.