我想获取脚本启动时的当前价格并将其保存在变量中

Question

这是我第一次写指标，我想让它像止损一样，这样当价格上涨时，指标（下面的线）随着价格上涨，当价格下跌时，指标（下面的线）保持不变，预计价格可能会触及该线。

但问题是：我用于存储启动时价格的变量与实时价格完全一致，并且不断更新。这样的东西还能吃吗？

如果你点亮它，我会非常高兴，如何正确地做到这一点:)

currentPrice = close

var float lowerLevel = na 

if na(lowerLevel)
    lowerLevel := currentPrice * 0.97 

if currentPrice > lowerLevel * 1.03
    lowerLevel := currentPrice * 0.97 

lineLength = 300 
var line lowerLine = line.new(na, na, na, na, color=color.green, width=1)

line.set_xy1(lowerLine, bar_index - lineLength, lowerLevel)
line.set_xy2(lowerLine, bar_index + lineLength, lowerLevel)

label.new(bar_index, currentPrice, "Current Price: " + str.tostring(currentPrice), style=label.style_label_up, color=color.white, textcolor=color.blue)
label.new(bar_index, lowerLevel, "Lower Level: " + str.tostring(lowerLevel), style=label.style_label_up, color=color.white, textcolor=color.green)

Answer 1

看来我找到了问题的答案，至少它坏了，但它有效，我在 1 分钟的时间范围内检查了它。

// Current price calculation
currentPrice = close

// Variable to store levels
var float lowerLevel = na // Initially uninitialized

// Flag to control updates
var bool isUpdating = true

// Initialize lowerLevel only on the first run
if na(lowerLevel)
    lowerLevel := currentPrice * 0.97 // Set the level to 3% below the current price on the first bar

// Check to update lowerLevel
if currentPrice > lowerLevel * 1.03
    lowerLevel := currentPrice * 0.97 // Update lowerLevel to 3% below the current price only if price has increased more than 3%
    isUpdating := true  // Allow further updates

// Stop updating if the price drops
if currentPrice < lowerLevel
    isUpdating := false // Block updates

// Check for price touching the lowerLevel
if low <= lowerLevel and high >= lowerLevel
    label.new(bar_index, lowerLevel, "Success! Price touched the green line.", style=label.style_label_up, color=color.white, textcolor=color.green)

// Set lines
lineLength = 300 // line length
var line lowerLine = line.new(na, na, na, na, color=color.green, width=1)

// Update the line only when the price rises and updates are allowed
if isUpdating
    line.set_xy1(lowerLine, bar_index - lineLength, lowerLevel)
    line.set_xy2(lowerLine, bar_index + lineLength, lowerLevel)

// Debug logs
label.new(bar_index, currentPrice, "Current Price: " + str.tostring(currentPrice), style=label.style_label_up, color=color.white, textcolor=color.blue)
label.new(bar_index, lowerLevel, "Lower Level: " + str.tostring(lowerLevel), style=label.style_label_up, color=color.white, textcolor=color.green)