在松树脚本 4 中绘制开盘价和开盘价和低价之间的蜡烛中间

Question

我正在尝试绘制 low_mark 和 open 以及 high_mark 和 open 之间的差异，当前代码将行放在上面而不是中间。

//@version=4
study("My Final Version", overlay=true, max_bars_back=500)
 
maxBarsBack = 500
 
previousRange = open[1] - close[1]
 
line bullEngulfOpen = na
line bullEngulfLow = na
line bullEngulfMid = na
 
line bearEngulfOpen = na
line bearEngulfHigh = na
line bearEngulfMid = na 
 
isBullEngulf = previousRange > 0 and close > open[1]
isBearEngulf = previousRange < 0 and close < open[1]

...我想在low_mark（红线）和high_mark（绿线）之间绘制mid_mark（黄线）。它把这条线放在上面是因为我认为它看错了蜡烛。

low_mark = nz(min(low, low[1]), low)
high_mark = nz(max(high, high[1]), high)
mid_mark= (nz(min(low, low[1]), low) + nz(max(high, high[1]), high)) /2
X_ = bar_index -1
 
if isBullEngulf
    bullEngulfOpen := line.new(X_, open[1], bar_index, open[1], extend=extend.right, color=color.green) 
    bullEngulfLow := line.new(X_, low_mark, bar_index, low_mark, extend=extend.right, color=color.red) 
    bullEngulfMid := line.new(X_, mid_mark, bar_index, mid_mark, extend=extend.right, color=color.yellow) 
    buy_message_1 = "Buy 1(Open) = " + tostring(open[1]) + "  Buy 2(Mid) = " + tostring(mid_mark) + "  Buy 3(Low) = " + tostring(low_mark) 
    alert(message=buy_message_1)
 
 
if isBearEngulf
    bearEngulfOpen := line.new(X_, open[1], bar_index, open[1], extend=extend.right, color=color.green)   
    bearEngulfHigh := line.new(X_, high_mark, bar_index, high_mark, extend=extend.right, color=color.red)
    bearEngulfMid := line.new(X_, mid_mark, bar_index, mid_mark, extend=extend.right, color=color.yellow) 
    //sell_message_1 = "Sell Price 1 (Open)  = " + tostring(open[1]) + "   Sell Price 2 (High) " + tostring(high_mark)
    sell_message_1 = "Sell 1(Open)  = " + tostring(open[1]) + "   Sell 2(Mid) " + tostring(mid_mark) + "   Sell 3(High) " + tostring(high_mark)
    //alert(message= sell_message_1)
// ALERTS