var DAYS_RSI = 14;          //RSI計算の日数
var COL_RSI = '#ff0000';    //RSIの色

//RSI表示
function dspRSI(){
    var rsiHeight;
    var yRate;
    var joushou;
    var geraku;
    var i;
    var j;
    var y;

    if (DAYS_RSI < gEd.length) {
        getCanvas("idrsi");
        gCtx.beginPath();
        gCtx.strokeStyle = COL_RSI;

        rsiHeight = document.getElementById("idrsi").height;
        yRate = rsiHeight / 100;

        //Ｘ座標と計算開始位置を求める
        stIdx = getDrawIdx(gStartIdx, DAYS_RSI);

        for (i = stIdx; i <= gEndIdx; i++) {
            joushou = 0;
            geraku = 0;
            for (j = i - 13; j <= i; j++) {
                if (gEd[j-1] < gEd[j]) {
                    joushou += (gEd[j] - gEd[j-1]);
                } else if(gEd[j-1] > gEd[j]) {
                    geraku += (gEd[j-1] - gEd[j]);
                }
            }
            y = rsiHeight - (joushou / (joushou + geraku) * 100) * yRate;
            if (i == stIdx) {
                gCtx.moveTo(gX, y);
            } else {
                gCtx.lineTo(gX, y);
            }
            gX += CNDL;
        }
        gCtx.stroke();
        gCtx.closePath();
    }
}