how much slippage to expect?

[rosy2]

Quote from Kris:

Am I right in assuming that most automated systems are punching in and out of positions (removing liquidity)?

no. providing liquidity is more likely

 

[larrybf]

Rabbitone.... great honest posting... it is a shame that new traders probably will not get to read this post to see the true realities of trading instead of all the spam email crap we all receive from system sellers....anyway nice posting by you

 

[Kris]

Quote from rosy2:

no. providing liquidity is more likely

Can you elaborate on this a bit...?

I'm thinking to unwind a position and get out at your stop your gonna have to hit... ie I'm long and the market is tanking I'm not going to put out an offer at my stop... I wouldn't get hit... I'm gonna punch the offer... that makes more sense to me... am I wrong on this?

 

[Rabbitone]

Quote from larrybf:

Rabbitone.... great honest posting... it is a shame that new traders probably will not get to read this post to see the true realities of trading instead of all the spam email crap we all receive from system sellers....anyway nice posting by you

Thank you for the comment. I agree with you that new traders building automation overlook slippage and commission. I know I did. When I finally used a reasonable slippage amount during testing it allowed me to be see some big holes I had to correct in my strategies algorithms.

Without slippage and commission spammers can make unprofitable trading systems look like curve fitted gems. Slippage and commission are a traders overhead.