为什么第二个'if'的内容从未执行过？

Question

I think it needs to work but does not. Please help me find out why? Thank you

//@version=5
strategy("Week High Low - Buy Strategy")

thisyear = year(timenow)
thisweek = weekofyear(timenow)
lastweekhigh = request.security(syminfo.tickerid, 'W', high[1], barmerge.gaps_off, barmerge.lookahead_on)
lastweeklow = request.security(syminfo.tickerid, 'W', low[1], barmerge.gaps_off, barmerge.lookahead_on)
halfline = (lastweekhigh + lastweeklow) / 2

buysignal = false
if close < halfline and close > lastweeklow
    i = 1
    while year[i] == thisyear and weekofyear[i] == thisweek
        if close[i] > lastweekhigh
            buysignal := true
            break
        i += 1

strategy.entry("long", strategy.long, 1, when = buysignal)

Answer 1

如果 close < halfline and close > lastweeklow ，使用 "or" 除了使用 "and" ，几个星期面临同样的错误==