Jezzode, I have a friend who has about $200M in net assets, for trading Forex solely. Let me tell you, I’ve asked him the same question, and from what he has stated, unless you are trading with $75-100M, liquidity won’t be an issue at all. Especially for the Fiber and Cable, I would assume.
Also, I’ve had the privilege to place (hit the “enter” button) a trade for a fund for 200 lots ($2000/pip) and still no liquidity problems. You don’t have to worry about 30 lots, it’s still considered “puny”.