松树脚本:如何找到X天前的价格

也许有更好的方法,但我目前使用的解决方法是一个带有 for 循环,向后扫描直到找到合适的日期。我的职责是:

priceXDaysAgo(numDays) =>
    targetTimestamp = time - numDays*60*60*24*1000
    
    // Declare a result variable with a "void" value
    float result = if false
        1
        
    // We'll scan backwards through the preceding bars to find the first bar
    // earlier than X days ago (it might be a little greater than X days if
    // there was a break in trading: weekend, public holiday, etc.)
    for i = 1 to 1000
        if time[i] < targetTimestamp
            result := close[i]
            break
    result

priceXDaysAgo(90)