queryTopAsync = function queryTopAsync(type){
    const QUERY_TYPE = {
        BV: 'top_buy_value',
        SV: 'top_sell_value',
    };
    let spanM       = cmd.span || '3m';
    let option      = conf.insider[MISC_QUERY_KEY].top;
    option.qs.span  = spanM;
    option.qs.order = QUERY_TYPE[type];

    request = Promise.promisify(request, {multiArgs:true});

    return request(option)
        .spread((resp, res) => {

            let tradings = res.data;
            to   = moment().format(ft.inDate);
            from = moment().subtract(_.parseInt(res.condition.span), 'months').format(ft.inDate);
            option.qs.span = res.condition.span;

            return { data: tradings, option };
        });
}
Display top buy/sell list of insider tradings
@param  {Object} topData  Trading list