Custom Darvas boxes indicator - non-repainting

I need a developer to program a custom indicator for me. The indicator is a variation of the Darvas boxes by Nicholas Darvas. It should show Darvas boxes (green for bullish, red for bearish, grey for the active box) and helping lines (displayed optional). The indicator should be able to reproduce the attached example with screenshots. 

Also some settings will be available in the indicator menu:

- Tolerance (pips): how much tolerance for mapping tops/bottoms should be allowed?

- Time frames: on which time frame should the darvas boxes be calculated and displayed?

- Lookback time: how many bars in the past should the plugin start to calculate and display the boxes?

- Colors: colors for bullish, bearish and current box (default: green, red, gray)

- Line color: colors for horizontal help lines (default: black, dotted)

- Line width: line thickness for boxes + horizontal lines

The indicator should be non-painting (boxes in the past remain in the same colour in which they were calculated).

The exact rules for the indicator and a bar-by-bar example I have attached as PDF documents. 

I am looking forward to offers and further inquiries!