Hello.
I have expertise in Amibroker and completed many challenging projects here on freelancer. As you say the indicator is repainting, only after analyzing it, I can say about making it seamless. It all depends on the strategy. So I propose to go forward with the project in 2 phases, first analysis of code for opportunities of improvements and then everything looks promising then go to the second phase and code it. At this stage a proper bid amount can't be estimated and we can discuss it after checking the codes.
Looking forward to work with you on this project
Thanking You
Joy Sebastian