One of the goals is to also gather things which have already been posted by community members. Always retaining the copyright they have posted, as for example:
Docs - ZigZag indicator for live trading
If you believe you have something to contribute, post it and it will be considered, just like anything else, but picked up things (initial idea) will be mostly related to indicators.
thanks for your reply, I understand it now. From the log information, I see the buy order is submitted, accepted and completed on the next bar, So it cannot be cancelled. The system is designed wisely.