Cheat Engine

[Fresco]

I have a strange code that uses one single address for multiple features.
the feature that i want off writes a certain value to that address.
in order to be able to disable the feature i have to know what's the maximum value that the code writes on the address.
how do i know or register the value that the code writes on the address ?
i tried the tracer but it shows me that the value of the address is 0 ... but i clearly see in the table that the code writes a huge value that starts decreasing immediately after the code was executed.
the code that writes is this :

[Dark Byte]

the value stored in the floating point register st0 will be written to ecx+c20 (check the float panel, NON xmm tab)

The maximum value that can be written is INF+ (in ce you set that value by entering 9999999999999999999999999999999999999999999999999 as value)