You can only send data to the Bolt Cloud via a Bolt module (Could be WiFi or GSM).
To send the data to the Bolt Cloud, via a raspberry pi, you will need to connect the Bolt module to the Raspberry pi, and link the Bolt module to a UART-INPUT type of a product.
When ever the Bolt module sends an 'RD\r' command, the pi should respond with the data that has to be logged to the Bolt Cloud.
This data has to be a CSV string with a maximum of 6 values in the string. example "223.5,123.5,34.7,56.8"
Configure the product on the Cloud to expect the same number of CSV's as that your pi will send to the Bolt module.
You can use multigraphs feature to plot multiple graphs on the Bolt Cloud simultaneously.
Also our systems allow line graphs, bar graphs, scatter, area, table and many more types of graphs.
You can read up on how to use them here
You can use services such as Integromat and IFTTT by using webhooks to setup your sms and email alert system
You can go to the Bolt IoT hackster page to find out how to implement the alert system