Simple EA required - Place Trailing stop at a certain point.

Hi,

Newbie, so I hope I explain this well enough. I was recommended to post here from another thread.

I'm looking for an Expert Adviser that I believe should be very simple to program, but I don't know what I'm doing. I've genuinely no idea what the going rate for this type of thing is. I'm obviously prepared to pay but if its too much I may just not bother. So please just give me an honest assessment of what would be needed. (I almost wonder if someone may have made such a thing already)

Basically, I just want a trailing stop, that only starts based on a certain price in relation to the original entry point. Effectively its a trailing take profit

So for example, on a buy trade. When the price goes 100 points above the entry price (so is in profit), it places a trailing stop 25 below the price (so 75 points above the original buy price).

So I would just need 2 parameters when placing the EA. Entry point distance in points and trail distance in points. I would want this to work on both Sell and Buy trades.

Finally - It would be good to know, if these EA's could be stacked. Could I put one on, that kicks in at a certain price, and another that takes over at another price again? Or would that need to be done with one, single EA, (potentially more complicated).

To explain, this is what I would be hoping to achieve, on a buy trade:

Price rises 100 points from trade entry, Trailing stop is placed 10 points behind. (so 90 above entry).

The price continues to rise, (does not fall by more than 10 points at any time), price reaches 150 points above trade entry, trailing stop is now placed 50 points behind (so 100 above original entry).

The trade then just plays out to finish after this.

Any further questions please let me know.