How to? EA to automatically change ( OrderMagicNumber )

[Forex Trader]

Hi. I have an EA that closes all trades when in profit, and then restarts again. On restart...I need my EA to create a new OrderMagicNumber (on it's own) so the EA won't look at previous MagicNumber when deciding whether to close my orders.
This cycle must be continuous so if magicnumber is 1000, next will be 1001, then 1002, and so on.

I've tried adding a +1 like this: (OrderMagicNumber() == uniqueMagic +1) but that doesn't seem to work.

Thank you in advance.

[Forex Trader]

Try to use global variable "MQL4: Global variables" to store last magic number

[Forex Trader]

thank you