Scalper Viper Indicator: A 7 And 13 Exponential Pair

Written by Dominic Walsh · Published 8 Jul 2026 · Last updated 9 Sep 2026

The scalper viper indicator keeps the toolkit to two settings. `FastEma` and `SlowEma` set a short exponential pair, and the code builds both itself rather than calling the terminal. Every crossing gets a mark, with the offset scaled by the size of the bar it sits on.

This build ships as a compiled .ex4 for MT4 and .ex5 for MT5.

Platforms	MT4 (.ex4) + MT5 (.ex5)
Chart window	Main price chart
Plots	2: Scalper Buy, Scalper Sell
Alerts	popup, push notification, email, sound
Inputs	8

What the Scalper viper Indicator draws on the chart

Scalper Buy places a medium spring green arrow at a crossing up.

Scalper Sell places a turquoise arrow at a crossing down.

Each mark sits half a bar range clear of the candle.

The two averages stay internal, so the chart carries only the marks.

• Scalper Buy: arrow, medium spring green, arrow code 233
• Scalper Sell: arrow, turquoise, arrow code 234

How the Scalper viper Indicator calculates its values

Two smoothing constants

kf takes 2 over `FastEma` plus one, and ks does the same with `SlowEma`. Each buffer then blends the new close with its own previous value using that constant. Both series seed from the first close, so neither spikes at the chart edge.

The crossing test

A buy needs the fast buffer at or below the slow one on the previous bar and above it now. The code reads its own buffers rather than recomputing, which keeps the comparison exact.

Scaling the mark

UpBuf takes low minus half the bar range and DnBuf takes high plus the same. A tall candle pushes the mark further out. That removes the need for a point setting to tune per instrument.

How to read the signals

A 7 and 13 pair crosses often, which is what the name implies.

Marks scale with the bar, so they stay readable on quiet and busy candles alike.

There is no filter at all, so a crossing against the larger trend looks identical.

Widen the gap between `FastEma` and `SlowEma` for fewer marks.

Alert channels in this build: popup, push notification, email and sound, one message per closed bar.

`EnableAlerts` arrives switched on and `EnablePopup` does the talking. `EnablePushNotify`, `EnableEmail` and `EnableSound` all begin false. `SoundFile` picks the clip. The crossing test reads completed bars, one message per bar.

Every Scalper viper Indicator input

Core settings

Setting	What it does	Default
FastEma	Fast average length, default `7`.	7
SlowEma	Slow average length, default `13`.	13

Alert settings

Setting	What it does	Default
EnableAlerts	Master switch for the viper cross alerts, default `true`.	on
EnablePopup	Terminal dialog on a viper cross, default `true`.	on
EnablePushNotify	Phone push on a viper cross, default `false`.	off
EnableEmail	Mail delivery on a viper cross, default `false`.	off
EnableSound	Sound playback on a viper cross, default `false`.	off
SoundFile	Wav clip for the cross alert, default `alert.wav`.	alert.wav

Settings that fit your chart

A seven-bar average is short by any standard, which points the tool at fast charts. On M5 the two lines cross several times an hour and the marks work as timing inside a plan. On M15 they thin out usefully. Above H1 a pair this quick reacts faster than the timeframe warrants.

When the Scalper viper Indicator fails

Two averages seven and thirteen bars apart cross constantly in a range.

Nothing filters the marks, so half of them point against the larger move.

Both averages read the same close series, so they are not independent views.

Copy the compiled Scalper viper Indicator file into your MQL4/Indicators folder, and the MT5 build into MQL5/Indicators, then restart the terminal and drag it onto a chart. The step-by-step guide with screenshots is at how to install MT4 and MT5 indicators.

Background reading on the method behind the Scalper viper Indicator: Mark Twain effect on Wikipedia, Force Index at StockCharts ChartSchool.

Download the Scalper viper Indicator for MT4 and MT5

The zip holds the compiled Scalper viper Indicator build for MT4 and MT5, plus a short README. Compiled files only, no source. Enter your email below and the download link arrives in your inbox.

FAQ

Why does FastEma get built rather than fetched?

So the crossing test reads the exact values the buffers hold. Recomputing an average for the comparison can differ in the last digit. Keeping both in buffers also makes the recursion visible if you open the source.

What does FastEma at 7 cover on M5?

About thirty-five minutes of trade. The slow line at `SlowEma` `13` covers just over an hour. That pairing is why the marks arrive frequently and why the tool suits short holding periods rather than swing work.

Why do the Scalper Buy and Sell arrows scale?

Because the offset takes half the bar range rather than a fixed number of points. A large candle pushes the mark further away and a small one keeps it close. One setting then works on any instrument without tuning.

Do the FastEma and SlowEma lines get drawn?

No. Both stay in internal buffers and only the two arrow plots draw. Add a standard exponential pair at the same lengths if you want to see the lines the crossings come from.

Are results guaranteed?

No. Trading involves risk. Results are not guaranteed; past performance is not indicative of future results. Use the Scalper viper Indicator as one input. Always backtest before trading live.