Free Fund Cash Value!

Free Funds (CASH),
Does your Free funds (cash) fluctuate at all in any minor way, is the cash value subject to any currency changes? TIA

On the Invest/ISA account, the free funds of your account do not fluctuate and are not influenced at all by the live result or forex impact of your open positions. Rather, they can change if you make a deposit/withdrawal or buy and sell shares.