Add a push alert and mobile and sound alert

Need to add an alert that sends push notifications to the mobile terminal and sound on the screen to notify the change of trend.

1-Add parameters to activate notifications:

  Send Sound Alert - allows sending sound notifications

  SendPush - allows sending mobile push notifications.

The message text should be as follows:

    BUY or SELL information, currency pair name and period are added based on the chart the indicator is running on

 BUY is the appearance of the arrow pointing up (little imposes the color)

 SELL is the appearance of the arrow pointing down (regardless of color)

Mobile push notifications should be sent as soon as the arrow appears. Only one signal per arrow can be sent.

 To monitor indicator operation on VPS, all sent messages should also be written to the logs

 The indicator must be optimal in terms of performance.