Store candle information into a file

Hi, 

I am looking for a way to export candles from a period of interest into any human-readable format (CSV, JSON etc) 
For instance, in the following screenshot, I would like to find a way to export all the candles along with their Open-high-low-close values, along with the position of the drawn lines. 
I am trying to collect datasets for sideway candles so I can write an algorithm to detect that automatically. 
So far my only idea is the create a custom bot and let that capture this information for me after I specified the trendline. I just wanted to ask if there is an easier way? or writing a custom tool is my best bet. I am new to Trading tools/software etc. 
Thank you.