Although there are many similar indicators out there, this particular one is based on code previously published by Mladen Rakic and incorporates a number of improvements, part of which was added following user request in comments.

List of fixes and improvements

• Trading alerts (Alerts in MT4 terminal, Email notifications, Push notifications).
• Inputs to enable/disable each alert type separately.
• Simplified and easy-to-grasp color theme.
• Additional signal buffer (Indicator output value).
• Miscellaneous minor fixes.

The list of adjustable parameters

• Average Period = 30 - indicator period.
• Sensitivity = 3 - sensitivity to price fluctuations.
• Enable Alerts = false - enable/disable trading alerts in MetaTrader 4.
• Enable Email Notification = false - enable/disable email trading alerts.
• Enable Push Notification = false - enable/disable push trading alerts.

Examples

Recommendations

• Please, make sure you combine these signals with other sources of fundamental and technical analysis, do not rely on this indicator alone for your trading decisions.