Sort:  

Thanks for the question! I trade on Coinigy and I can set a stop/limit order that is held off the exchange. You can set a stop/limit on Poloniex directly too, but I find Coinigy easier to work with as it graphically represents my order on the chart.
Just pick your sell stop, like .001 - set that as the stop value, something as the limit like .00095 and enter the order. In this example a limit order at .00095 is place on the exchange if the price falls below .001.
DISCLAIMER - that Coinigy link is a referral link. If you subscribe I get $15. That won't change my life and I'm not pimping it, but if you do sub and I get $15 that's great.

Hehe, I will bear that in mind!! It's quite the referral isn't it!

I did wonder as I use bittrex and always thought an option like that would be handy

Coinigy works for bittrex as well. I don't know what order options bittrex provides natively.
It's actually safer to trade through an api because you can't be browser hijacked.

Oh that's true! Will have a think on that as well!!

Of course if you have proper security setup, you should be protected from that as well I suppose.

I can but hope!

By the way, your upvote was wicked helpful - thank you.

Really? Aw cool! A pleasure!