@Orago: I have looked into this for you, and there does not appear to be a way to link the Clock app Alarm to in-app actions. Does the Crypro app have a notification option for changes in stock prices? If so, you may wish to try heading to Settings > Modes & Routines > Routines > If > Notification received > Then > Open an app or do an app action > Add alarm. Alternatively, adjust the notification sound via Settings > Apps > Crypro > Notification categories > Select the relevant category > Sound.
@Orago: It is possible to increase your overall battery life at the expense of processing speed by heading to Settings > Device care > Performance profile > Set this to 'Light'. You can also take a look at your Battery usage, then head to Battery > Background usage limits, and place apps that are using a higher than expected amount of battery in the 'Sleeping apps' or 'Deep sleeping apps' categories.
For general battery saving tips, please make sure to close apps when not in use via the Recents button in your Navigation bar (3 vertical lines), and switch off Wi-Fi, Bluetooth and Mobile data during periods of downtime.
