Flipping directions but adding more

Here is an example of what I am trying to do

Lets say I am long 5 micro lots (5,000) on AUD/USD from .7045 and it has gone up to .7150 I want to flip short but I do not want to flip short unless it hits .7145 and I want to put 5 1/2 micro lots on (5,500)

Do I simply put a stop/loss for 10 1/2 micro lots (10,500) so when it hits, my 5,500 short trade is placed?

Thanks for the help

Use a simulator..it may give you the answer

like DojiSan says, you can test it on a demo account, but I can also give you an answer to your puzzle.........I think stop/loss is the wrong term here: you can only place a stop loss on the long 5 micro lots (5,000)........now I assume you want to close out your long 5,000 units and go short 5,500 units.........if your brokers allows hedging (being long AND short in the same account), you place a stop loss for your longs 5,000 units @ .7145 and place a separate sell stop order for 5,500 units @ .7145...............if your broker doesn`t allow hedging, you can place a sell stop order for 10,500 units @ .7145 and your broker will cancel out your long position and you`re left with the short position of 5,500 units..........hope this helps you