Inclusion of Parameters in an existing Indicator.

I have an indicator(mq4) that plots a second currency pair on the chart, for example with the EURUSD chart open I can include GBPUSD and view both simultaneously, although the secondary currency pair (GBPUSD) will be in the same price range as the primary (EURUSD), in short a correlation indicator.

I would like to include some parameters in this indicator, below:

1- That it shows me without repainting, a 12 month history;

2- That it shows me the real time price difference between the 2 pairs;

3- That it shows me the biggest difference of closing price between the 2 pairs; (Daily, Weekly, Monthly, Yearly)

4- That there is an alert when it occurs: 

4.a- Crossing between the pairs;

4.b- A minimum distance between pairs (number determined by me), that is, when they are close to crossing;

4.c- A maximum distance between the pairs (number determined by me), that is, when they are too far away from each other.

4.d- ***The above distances can be in % or in a numerical scale, for example, 0-100, or any other way that facilitates the programmer's work.

5- Alerts should be: 

5.a- Pop-up

5.b- Mobile Phone

5.c- Email

5.d- Alerts with True and False options.

6- Spread of the 2 pairs.

***If there is any difficulty in understanding, please ask me, because I am using a translator and some translation error may occur.