symbols - 松树脚本看不到股票代码

Question

几年来我一直在使用以下股票代码（AVVN 和 DVCN），今天早上我的 pine 脚本突然抛出一个错误，上面写着“Resolve_error'AVVN'，no_such_symbol”，对于 DVCN 也是如此，但目前没有其他错误。有解决办法吗？以下是我正在使用的代码：

exch = input(0, type = integer, minval=0, maxval=8,
    title="Exch: NYSE=0 NASDAQ=1 AMEX=2 OTC=3 TSX=4 TSXV=5 ETFS=6 
    Total=7 CAD Total=8")
adv_ticker = 
    exch == 8 ? "AVVX" : 
    exch == 7 ? "AVVT" : 
    exch == 6 ? "AVVE" : 
    exch == 5 ? "AVVV" : 
    exch == 4 ? "AVVS" : 
    exch == 3 ? "AVVD" : 
    exch == 2 ? "AVLU" : 
    exch == 1 ? "AVVQ" : 
    "AVVN"
dec_ticker = 
    exch == 8 ? "DVCX" : 
    exch == 7 ? "DVCT" : 
    exch == 6 ? "DVCE" : 
    exch == 5 ? "DVCV" : 
    exch == 4 ? "DVCS" : 
    exch == 3 ? "DVCD" : 
    exch == 2 ? "DVCA" : 
    exch == 1 ? "DVCQ" : 
    "DVCN"  
adv1 = security(adv_ticker, period, close)
dec = security(dec_ticker, period, close)

标签： symbolsticker