【求助】在指标上加上警报程序就卡死？

	#property indicator_separate_window #property indicator_buffers 4 #property indicator_color1 Black #property indicator_color2 Red #property indicator_color3 Black #property indicator_color4 Red extern bool EmailON=false; extern int FastEMA = 12; extern int SlowEMA = 26; extern int SignalSMA = 9; double g_ibuf_88[]; double g_ibuf_92[]; double g_ibuf_96[]; double g_ibuf_100[]; int init() {    SetIndexStyle(0, DRAW_HISTOGRAM);    SetIndexStyle(1, DRAW_LINE);    SetIndexDrawBegin(1, SignalSMA);    IndicatorDigits(Digits + 1);    SetIndexBuffer(0, g_ibuf_88);    SetIndexBuffer(1, g_ibuf_92);    SetIndexBuffer(2, g_ibuf_96);    SetIndexBuffer(3, g_ibuf_100);    SetIndexStyle(2, DRAW_ARROW);    SetIndexStyle(3, DRAW_ARROW);    SetIndexArrow(2, 233);    SetIndexArrow(3, 234);    IndicatorShortName("MACD(" + FastEMA + "," + SlowEMA + "," + SignalSMA + ")");    SetIndexLabel(0, "MACD");    SetIndexLabel(1, "Signal");    return (0); } int start() {    int li_4 = IndicatorCounted();    if (li_4 > 0) li_4--;    int li_0 = Bars - li_4;    for (int li_8 = 0; li_8 < li_0; li_8++) g_ibuf_88[li_8] = iMA(NULL, 0, FastEMA, 0, MODE_EMA, PRICE_CLOSE, li_8) - iMA(NULL, 0, SlowEMA, 0, MODE_EMA, PRICE_CLOSE, li_8);    for (li_8 = 0; li_8 < li_0; li_8++) g_ibuf_92[li_8] = iMAOnArray(g_ibuf_88, Bars, SignalSMA, 0, MODE_SMA, li_8);    for (li_8 = 0; li_8 < li_0; li_8++) {       if (g_ibuf_88[li_8 + 1] < 0.0 && g_ibuf_88[li_8] > 0.0) g_ibuf_96[li_8] = g_ibuf_88[li_8];             Alert(Symbol()+"MACD 上穿0轴");                 if (g_ibuf_88[li_8 + 1] > 0.0 && g_ibuf_88[li_8] < 0.0) g_ibuf_100[li_8] = g_ibuf_88[li_8];                Alert(Symbol()+"MACD 下穿0轴");           }    return (0); } 复制代码 请问，如题，加载上去就不断提示直至卡死，如何改写才让它只提示一次呢？谢谢!!!