Cheat Engine

[Davethewave]

I found code to a game that allows me to alter my speed when I nop the base code, however, this also effects many other addresses which lags it out and I'm trying to narrow the address down to speed alone.
For example:

Address 00690024 = value F39037A1 one moment, then quickly changes to another value like E047BAE0 then quickly changes to another value over and over, it's very fast and one of the values it's changing to has to do with my speed, I just don't know how to narrow it down. If I freeze this address alone I run fast and there's no lag like when I nop the base code but there's no way to set a hotkey to this type of address, when I try to set a hotkey to this type of address it says "Access violation at address 00473fb1 in module 'Cheat Engine.exe' read of address 00000078" I've run into this kind of address before and I don't remember how I got around it. When I pointer scan for this address also it finds pointers but then it just crashes when I try to save the pointer table.

If anyone can help me out that'd be great, and if you need more info just let me know, sorry if I don't explain my problems well.

Edit* I'll also give you the "extra info" just in case that helps.

00539503 - mov ecx, [esp+24]
00539507 - add esi,ebp
00539509 - mov [ecx],esi
0053950b - mov [ecx+04],edx
0053950e - mov eax, [eax+000000b0]

Copy memory
The value of the pointer needed to find this addres is probably 00690024

EAX=0068FF70 EDX=31440E14 ESP=0012F2F0
EBX=3500EAA4 ESI=34C7B93B EBP=1B87A0BB
ECX=00690024 EDI=8A5EDAFE EIP=0053950B