指数平滑移動平均線EMAとは?設定方法やゴールデンクロスも紹介【FXデイトレード】

//@version=5
indicator("EMA + 乖離通知 + 複数Webhook（ローソク足選択可）", overlay=true)

// === EMA計算 ===
ema25  = ta.ema(close, 25)
ema50  = ta.ema(close, 50)
ema100 = ta.ema(close, 100)
ema200 = ta.ema(close, 200)

// EMAライン表示
plot(ema25,  color=color.yellow, title="EMA25")
plot(ema50,  color=color.blue,   title="EMA50")
plot(ema100, color=color.white,  title="EMA100")
plot(ema200, color=color.orange, title="EMA200")

// === EMA通知対象チェック ===
notify25  = input.bool(true, "EMA25通知")
notify50  = input.bool(false,"EMA50通知")
notify100 = input.bool(false,"EMA100通知")
notify200 = input.bool(false,"EMA200通知")

// === 通知閾値 ===
deviationAlert = input.float(5, "通知閾値 (%)")

// === Webhook & 通知対象ローソク足（最大8個） ===
webhook1 = input.string("", "Webhook 1")
tf1      = input.timeframe("60", "Webhook1 通知対象ローソク足")
webhook2 = input.string("", "Webhook 2")
tf2      = input.timeframe("60", "Webhook2 通知対象ローソク足")
webhook3 = input.string("", "Webhook 3")
tf3      = input.timeframe("60", "Webhook3 通知対象ローソク足")
webhook4 = input.string("", "Webhook 4")
tf4      = input.timeframe("60", "Webhook4 通知対象ローソク足")
webhook5 = input.string("", "Webhook 5")
tf5      = input.timeframe("60", "Webhook5 通知対象ローソク足")
webhook6 = input.string("", "Webhook 6")
tf6      = input.timeframe("60", "Webhook6 通知対象ローソク足")
webhook7 = input.string("", "Webhook 7")
tf7      = input.timeframe("60", "Webhook7 通知対象ローソク足")
webhook8 = input.string("", "Webhook 8")
tf8      = input.timeframe("60", "Webhook8 通知対象ローソク足")

webhooks   = array.from(webhook1,webhook2,webhook3,webhook4,webhook5,webhook6,webhook7,webhook8)
timeframes = array.from(tf1,tf2,tf3,tf4,tf5,tf6,tf7,tf8)

// === 乖離率計算 ===
dev25  = (close - ema25)  / ema25  * 100
dev50  = (close - ema50)  / ema50  * 100
dev100 = (close - ema100) / ema100 * 100
dev200 = (close - ema200) / ema200 * 100

// === 小窓表示 ===
showDeviation  = input.bool(true,"小窓表示")
tablePosition  = input.string("top_right", "小窓位置", options=["top_right","top_left","bottom_right","bottom_left"])
getPos(opt) => opt == "top_right" ? position.top_right : opt == "top_left" ? position.top_left : opt == "bottom_right" ? position.bottom_right : position.bottom_left
pos = getPos(tablePosition)

var table info = table.new(pos,1,6,border_width=1,frame_color=color.gray)
colorDev(val) => val >= 0 ? color.new(color.green,0) : color.new(color.red,0)

if showDeviation and barstate.islast
    table.cell(info,0,0,"EMA25: "+str.tostring(dev25,"#.##")+"%",text_color=colorDev(dev25))
    table.cell(info,0,1,"EMA50: "+str.tostring(dev50,"#.##")+"%",text_color=colorDev(dev50))
    table.cell(info,0,2,"EMA100:"+str.tostring(dev100,"#.##")+"%",text_color=colorDev(dev100))
    table.cell(info,0,3,"EMA200:"+str.tostring(dev200,"#.##")+"%",text_color=colorDev(dev200))
    table.cell(info,0,4,"通知閾値: ±"+str.tostring(deviationAlert)+"%",text_color=color.yellow)
    table.cell(info,0,5,"Webhookは設定欄で確認",text_color=color.blue)

// === アラート条件（Webhookごとにローソク足を判定） ===
for i = 0 to 7
    w = array.get(webhooks,i)
    tf = array.get(timeframes,i)
    if w != "" and timeframe.isintraday and timeframe.period == tf
        if notify25 and math.abs(dev25)>=deviationAlert
            alert(w+" EMA25乖離通知: "+str.tostring(dev25,"#.##")+"%", alert.freq_once_per_bar_close)
        if notify50 and math.abs(dev50)>=deviationAlert
            alert(w+" EMA50乖離通知: "+str.tostring(dev50,"#.##")+"%", alert.freq_once_per_bar_close)
        if notify100 and math.abs(dev100)>=deviationAlert
            alert(w+" EMA100乖離通知: "+str.tostring(dev100,"#.##")+"%", alert.freq_once_per_bar_close)
        if notify200 and math.abs(dev200)>=deviationAlert
            alert(w+" EMA200乖離通知: "+str.tostring(dev200,"#.##")+"%", alert.freq_once_per_bar_close)