KatanaFlow: Free TradingView Indicator (Pine Script)

Add It to Your TradingView Chart

1Copy the scriptPress Copy script above, or the copy button on the code below.
2Open the Pine EditorOpen a TradingView chart and choose Pine Editor at the bottom of the screen.
3Paste over the templateCreate a new indicator, select all of the template text and paste. Press Save and give it a name.
4Add it to the chartPress Add to chart, then adjust the settings with the gear icon next to its name.

Source Code

103 lines of Pine Script v6 from KatanaFlow.pine.txt, published under MIT. Keep the author's credit and licence lines when you reuse it.

KatanaFlow.pine.txt

// KatanaFlow v1.0.1
// Geliştirici: Mert Yavuz
// Güncelleme: 2025-08-08 19:23:58
//@version=6
indicator("KatanaFlow", overlay=true)

// === Kullanıcı Modu Ayarı ===
mod = input.string("Temel", title="Kullanıcı Modu", options=["Temel", "Uzman"])

// === TRF (Twin Range Filter) ===
source = input.source(close, title="Veri Kaynağı (TRF)")
per1 = input.int(12, minval=1, title="Hızlı Periyot")
mult1 = input.float(1.0, minval=0.1, title="Hızlı Aralık Katsayısı")
per2 = input.int(4, minval=1, title="Yavaş Periyot")
mult2 = input.float(2.0, minval=0.1, title="Yavaş Aralık Katsayısı")

smoothrng(x, t, m) =>
    wper = t * 2 - 1
    avrng = ta.ema(math.abs(x - x[1]), t)
    ta.ema(avrng, wper) * m

smrng1 = smoothrng(source, per1, mult1)
smrng2 = smoothrng(source, per2, mult2)
smrng = (smrng1 + smrng2) / 2

var float filt = source
filt := source > filt[1] ? (source - smrng < filt[1] ? filt[1] : source - smrng) : (source + smrng > filt[1] ? filt[1] : source + smrng)

var float upward = 0.0
var float downward = 0.0
upward := filt > filt[1] ? nz(upward[1]) + 1 : filt < filt[1] ? 0 : nz(upward[1])
downward := filt < filt[1] ? nz(downward[1]) + 1 : filt > filt[1] ? 0 : nz(downward[1])

hband = filt + smrng
lband = filt - smrng

longCond = (source > filt and upward > 0)
shortCond = (source < filt and downward > 0)

var int CondIni = 0
CondIni := longCond ? 1 : shortCond ? -1 : CondIni[1]

long = longCond and CondIni[1] == -1
short = shortCond and CondIni[1] == 1

plotshape(long, title="KATA Long", text="KATA Long", style=shape.labelup, textcolor=color.black, size=size.tiny, location=location.belowbar, color=color.lime)
plotshape(short, title="KATA Short", text="KATA Short", style=shape.labeldown, textcolor=color.white, size=size.tiny, location=location.abovebar, color=color.red)

alertcondition(long, title="KATA Long", message="📈 KATA Long sinyali")
alertcondition(short, title="KATA Short", message="📉 KATA Short sinyali")

plot(mod == "Uzman" ? filt : na, title="TRF Filtresi", color=color.gray)
plot(mod == "Uzman" ? hband : na, title="TRF Üst Bant", color=color.red)
plot(mod == "Uzman" ? lband : na, title="TRF Alt Bant", color=color.green)

// === REMA (KATA Trend) ===
price = input.source(close, 'Veri Kaynağı (KATA)', group='KATA Trend Ayarları')
length = input.int(45, minval=1, group='KATA Trend Ayarları')
smooth = input.int(1, minval=1, group='KATA Trend Ayarları')
mult = input.float(0.3, minval=0.05, maxval=3, step=0.05, title='Genişlik', inline='SD Kanal', group='KATA Trend Ayarları')
sd_len = input.int(5, minval=1, title='Periyot', inline='SD Kanal', group='KATA Trend Ayarları')

baseline = ta.wma(price, sd_len)
dev = mult * ta.stdev(price, sd_len)
upper = baseline + dev
lower = baseline - dev
cprice = price > upper ? upper : price < lower ? lower : price
REMA = ta.wma(ta.wma(cprice, length), smooth)
REMA_up = REMA > REMA[1]
plot(REMA, title='KATA Trend Çizgisi', color=REMA_up ? color.green : color.red, linewidth=3)

SwingDn = REMA_up[1] and not REMA_up
SwingUp = REMA_up and not REMA_up[1]
alertcondition(SwingUp, title="KATA Swing Up", message="📊 KatanaFlow trend yukarı döndü")
alertcondition(SwingDn, title="KATA Swing Down", message="📊 KatanaFlow trend aşağı döndü")
alertcondition(SwingUp or SwingDn, title="KATA Trend Değişimi", message="📊 KatanaFlow trend yön değiştirdi.")

// === Opsiyonel MA'lar (Uzman modda açılır) ===
f_ma(source, length, mtype) =>
    switch mtype
        'SMA' => ta.sma(source, length)
        'EMA' => ta.ema(source, length)
        => ta.wma(source, length)

gr_ma = 'Opsiyonel MA\'lar'
t_ma1 = 'MA #1'
t_ma2 = 'MA #2'

show_ma1 = input.bool(false, t_ma1, inline=t_ma1, group=gr_ma)
ma1_type = input.string('SMA', '', options=['SMA', 'EMA', 'WMA'], inline=t_ma1, group=gr_ma)
ma1_source = input.source(close, '', inline=t_ma1, group=gr_ma)
ma1_length = input.int(50, '', minval=1, inline=t_ma1, group=gr_ma)
ma1_color = #9c27b0
ma1 = f_ma(ma1_source, ma1_length, ma1_type)
plot(mod == "Uzman" and show_ma1 ? ma1 : na, color=color.new(ma1_color, 0), title=t_ma1, linewidth=1)

show_ma2 = input.bool(false, t_ma2, inline=t_ma2, group=gr_ma)
ma2_type = input.string('SMA', '', options=['SMA', 'EMA', 'WMA'], inline=t_ma2, group=gr_ma)
ma2_source = input.source(close, '', inline=t_ma2, group=gr_ma)
ma2_length = input.int(100, '', minval=1, inline=t_ma2, group=gr_ma)
ma2_color = #1163f6
ma2 = f_ma(ma2_source, ma2_length, ma2_type)
plot(mod == "Uzman" and show_ma2 ? ma2 : na, color=color.new(ma2_color, 0), title=t_ma2, linewidth=1)

Overview

KatanaFlow calculates adaptive volatility bands using dual-period range smoothing to filter out price noise and plots buy and sell signal labels on the price chart. In Expert mode, the indicator displays filter bands and dynamic support-resistance lines. User settings allow customization of fast and slow filter periods, range multipliers, and trend length. It plots directly on the price chart pane.

Twin Range Filter dual volatility smoothing
Dual display modes for basic or expert analysis
Custom REMA trend line with color coding
Alert conditions for automated trading triggers

Details

Published by

7mertyavuz on GitHub

Type

Indicator, Pine Script v6

Draws

On the price chart

Markets

Any symbol

Timeframes

Any timeframe

Risk Notes

No repainting, lookahead or stacked entries were found in its code or README. That says nothing about how well it works: test it first.

File

KatanaFlow.pine.txt

Repository

github.com/7mertyavuz/TradingView-Indicator

Settings

The inputs you can change from the gear icon on the chart. Defaults are the author's.

Setting	Type	Default	Variable
Kullanıcı Modu	`string`	`Temel`	`mod`
Veri Kaynağı (TRF)	`source`	`close`	`source`
Hızlı Periyot	`int`	`12`	`per1`
Hızlı Aralık Katsayısı	`float`	`1.0`	`mult1`
Yavaş Periyot	`int`	`4`	`per2`
Yavaş Aralık Katsayısı	`float`	`2.0`	`mult2`
Veri Kaynağı (KATA)	`source`	`close`	`price`
length	`int`	`45`	`length`
smooth	`int`	`1`	`smooth`
Genişlik	`float`	`0.3`	`mult`
Periyot	`int`	`5`	`sd_len`
show_ma1	`bool`	`false`	`show_ma1`

Show all 19 settings

Setting	Type	Default	Variable
ma1_type	`string`	`SMA`	`ma1_type`
ma1_source	`source`	`close`	`ma1_source`
ma1_length	`int`	`50`	`ma1_length`
show_ma2	`bool`	`false`	`show_ma2`
ma2_type	`string`	`SMA`	`ma2_type`
ma2_source	`source`	`close`	`ma2_source`
ma2_length	`int`	`100`	`ma2_length`

Third-party code. ForexR did not write, test or endorse this script, and the summary above was generated automatically from its code and README. Indicators describe the past, and a strategy's backtest can look better than live trading, especially when a script repaints. Check it in the Strategy Tester and on a demo account before you rely on it.

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