{
  "M15": [
    {
      "instrument": "AUD_CAD",
      "strengths": [
        53.930117469103,
        56.839510794818,
        52.878435349812
      ]
    }
  ],
  "M30": [
    {
      "instrument": "AUD_CAD",
      "strengths": [
        43.836213117189,
        44.900229790895,
        46.772567810138
      ]
    }
  ]
}

Handlebars.registerHelper('grouped_each', function(every, context, options) {
    var out = "", subcontext = [], i;
    if (context && context.length > 0) {
        for (i = 0; i < context.length; i++) {
            if (i > 0 && i % every === 0) {
                out += options.fn(subcontext);
                subcontext = [];
            }
            subcontext.push(context[i]);
        }
        out += options.fn(subcontext);
    }
    return out;
});

<script id="strength-template" type="text/x-handlebars-template">
    {{#grouped_each 4 timeframes}}
      <tr>
        {{#each this}}
          <td>
            <span class="bold">{{instrument}}</span><br />
            {{#each strengths as |strength index|}}
                {{if index ", "}}{{strength}}
            {{/each}}
          </td>
        {{/each}}
      </tr>
    {{/grouped_each}}
  </script>

var rsiTemplate = Handlebars.compile($('#strength-template').html());
var rsiPlaceholder = $("#rsi-body");

function drawRsi(data) {
    if(data) {
    var wrapper = {
        timeframes: data
    };
        rsiPlaceholder.prepend(rsiTemplate(wrapper));
    } else {
        tableFillers("#rsi-body", 4)
    }
};