Simple multi-variety commodity futures moving average line strategy

The commodity futures library implements the strategic framework of the $.CTA function. With this strategy framework, a multi-variety strategy of concurrent stable and real market strategy can be achieved in just a few dozen lines.

function main() {
    // using commodity futures library of the CTA strategy framework
    $.CTA(Symbols, function(st) {
        var r = st.records
        var mp = st.position.amount
        var symbol = st.symbol
        /*
        r is the K line, mp is the current variety position, positive number refers to long positions, negative number refers to short position, 0 means no position, 
        symbol refers to variety name       
        The return value is n: 
            n = 0 : Refers to close all position (regardless of the current holdings position)
            n > 0 : If there are currently holding long positions, adding n long positions, if the current position is short position, then close n short positions, 
                    if n is greater than the current holding position, then open long positions      
            n < 0 : If the current position is short position, adding n short positions. If the current position is long positions, then close n long positions.
                    If -n is greater than the current holding position, then open short position.   
            No return value means doing nothing
        */
        if (r.length < SlowPeriod) {
            return
        }
        var cross = _Cross(TA.EMA(r, FastPeriod), TA.EMA(r, SlowPeriod));
        if (mp <= 0 &amp;&amp; cross > ConfirmPeriod) {
            Log(symbol, "up cross cycle", cross, "Current holding position", mp);
            return Lots * (mp < 0 ? 2 : 1)
        } else if (mp >= 0 &amp;&amp; cross < -ConfirmPeriod) {
            Log(symbol, "down cross cycle", cross, "Current holding position", mp);
            return -Lots * (mp > 0 ? 2 : 1)
        }
    });
}

And the strategy arguments setting:

for more information please see: https://www.fmz.com/bbs-topic/2294

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