BO Turbo Alert Indicator: Four Filters On One Bar

Written by Dominic Walsh · Published 30 Jul 2026 · Last updated 9 Sep 2026

The bo turbo alert indicator asks four questions of the same closed bar. Did the stochastic leave its extreme? Is the fast RSI turning with room left? Is the 3-bar average pointing the right way? Did the close take the bar? Only a yes to all four prints an arrow.

This build ships as a compiled .ex4 for MT4 and .ex5 for MT5; the screenshots below come from EURUSD H1.

Platforms	MT4 (.ex4) + MT5 (.ex5)
Chart window	Main price chart
Plots	3: Turbo MA, Turbo Buy, Turbo Sell
Alerts	popup, push notification, email, sound
Inputs	18

What the Bo Turbo Alert Indicator draws on the chart

Turbo MA is the medium purple line, a 3-bar weighted average of the close.

Turbo Buy places an aqua arrow under a qualifying bar.

Turbo Sell places a magenta arrow above one.

An OBJ_TEXT label sits beside each arrow with the direction spelled out.

• Turbo MA: line, medium purple, width 1
• Turbo Buy: arrow, aqua, width 3, arrow code 233
• Turbo Sell: arrow, magenta, width 3, arrow code 234

How the Bo Turbo Alert Indicator calculates its values

Leaving the stochastic extreme

stochBuy needs %K below `InpStochOs` `20.0` on the previous closed bar and back at or above it now. stochSell mirrors that against `InpStochOb` `80.0`. The reading comes from iStochastic at `InpStochK` `5`, `InpStochD` `3` and `InpStochSlow` `3`. That is the trigger the other three filters vote on.

Checking the fast RSI has room

rsiBuy needs iRSI at `InpRsiPeriod` `7` to be rising and still below `InpRsiBuyCap` `60.0`. The cap is the point of it. A stochastic bounce into an already stretched RSI is the classic way these setups fail, so the code blocks it.

Adding direction and close strength

maBuy needs the weighted average at `InpMaPeriod` `3` to be rising. barBuy needs the close to take at least `InpCloseStr` `0.60` of the bar range from the low. `InpCooldown` `4` then blocks a second arrow in the same direction for four bars.

How to read the signals

An arrow means four separate tests agreed on one closed bar.

Nothing is judged on the forming bar, so a printed arrow stays put.

Raise `InpCloseStr` toward 0.75 when weak-looking bars keep qualifying.

The purple line is context for the direction filter, not a signal of its own.

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

`EnableAlerts` ships on with `EnablePopup` carrying the message. `EnablePushNotify`, `EnableEmail` and `EnableSound` stay off by default. `SoundFile` names the clip. Every test reads a closed bar, and the guard allows one message per bar.

Every Bo Turbo Alert Indicator input

Core settings

Setting	What it does	Default
InpStochK	Stochastic %K period (fast). Stochastic %K period, default `5`.	5
InpStochD	Stochastic %D period. Stochastic %D period, default `3`.	3
InpStochSlow	Stochastic slowing. Stochastic slowing, default `3`.	3
InpStochOb	Stochastic overbought. Overbought line the sell trigger leaves, default `80.0`.	80.0
InpStochOs	Stochastic oversold. Oversold line the buy trigger leaves, default `20.0`.	20.0
InpRsiPeriod	Fast RSI period. Fast RSI length, default `7`.	7
InpRsiBuyCap	Buy blocked above this RSI. Buy blocked when RSI sits above this, default `60.0`.	60.0
InpRsiSellFlr	Sell blocked below this RSI. Sell blocked when RSI sits below this, default `40.0`.	40.0
InpMaPeriod	Fast MA period (direction filter). Weighted average length behind the direction filter, default `3`.	3
InpCloseStr	Close must take this share of the bar range. Share of the bar range the close must take, default `0.60`.	0.60
InpCooldown	Minimum bars between same-direction arrows. Bars enforced between same-direction arrows, default `4`.	4

Display settings

Setting	What it does	Default
InpArrowOffset	Arrow offset (points). Turbo arrow distance from the bar in points, default `60`.	60

Alert settings

Setting	What it does	Default
EnableAlerts	Switches the turbo alerts on as a group, default `true`.	on
EnablePopup	Raises the terminal dialog on a turbo signal, default `true`.	on
EnablePushNotify	Sends the turbo signal to your phone, default `false`.	off
EnableEmail	Mails the turbo signal through the terminal, default `false`.	off
EnableSound	Plays a file when a turbo signal prints, default `false`.	off
SoundFile	Name of the wav file the turbo alert uses, default `alert.wav`.	alert.wav

Settings that fit your chart

Four filters on one bar suits fast charts, which is what the settings assume. EURUSD H1 is the reference chart for the screenshots. M5 and M15 are where a 5-bar stochastic and a 7-bar RSI belong. On H4 the same filters agree so rarely that whole weeks pass without an arrow.

When the Bo Turbo Alert Indicator fails

Four conditions on one bar is a narrow gate. Many good reversals miss it by one test.

`InpCooldown` `4` hides a genuine second signal as readily as a duplicate.

A stochastic exit in a strong trend fires against the move, and the other filters cannot always catch that.

Copy the compiled Bo Turbo Alert 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 Bo Turbo Alert Indicator: Noisy market hypothesis on Wikipedia, Lot at Investopedia.

Download the Bo Turbo Alert Indicator for MT4 and MT5

The zip holds the compiled Bo Turbo Alert 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

What does InpCloseStr at 0.60 demand?

That the close lands in the top 60 percent of the bar range for a buy. upShare takes close minus low over the range. A doji fails this easily. Raise it toward 0.75 when weak bars keep slipping through the other three filters.

Why does InpRsiBuyCap block a buy at 60?

Because the stochastic can leave oversold while RSI has already run. Buying there means buying into a move that has spent itself. `InpRsiBuyCap` `60.0` keeps the entry to bars where the fast RSI still has somewhere to go.

What is the Turbo MA line for?

It shows the 3-bar weighted average that the direction filter reads. maBuy needs that line rising, so plotting it lets you see why an arrow did or did not print. It carries no signal of its own beyond that.

How does InpCooldown stop arrow clusters?

By counting bars since the last same-direction arrow. At `4` a second buy cannot print for four bars. In a chop the stochastic leaves oversold repeatedly, and without that gap the chart fills with marks that all describe one wobble.

Are results guaranteed?

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