Slippage and Spread: how to get them

[Gryphon]

Just on your slippage point - in the gforms plugin it records the difference between advice price and actual price for live bots and gives you an average difference. It's not slip in the conventional sense but (if my understanding of how backtesting works is right) it gives a realistic figure to use in backtesting  - assuming you have ran a live bot on the market for a bit.