There was a post, a few years ago, I can not recall the name of the poster, he said he would not use less than 50,000 bars on a one hour chart. He would not go lower than one hour bars.

Myself, in my reading on the net, have seen opinions that using less than one hour is folly because the brokers can mess with the bars, whereas better data points with the higher time frames.

I like 60 minutes and up, just my preference.

When I am using MT5, I work with 8 hour bars because better data points.

Popov made a couple profiatble ea's with 15 minute charts... on the videos, and I bet those are still profitable.

I think the decision as to how much maintenance you want to do....... the faster the time frame, the more maintenance.

The faster charts will indicate a move well in advance of the slower charts, they also give more false signals.

Trading the faster charts means that you will pay more spread to the broker.

I have one ea that is on a daily chart, it uses a pair of donchian channels and no stop loss. It a lot of small losses and a few huge profits.

Everything is relative to what you feel you want in your trading plan....... what you feel to be right.

So am I making the right assumption that if I use a 4hr time chart, I can't use smaller time frame such as 30min or 15min as a Longer Time Frame option?

Ideally, I wish I can use a 4hrs time chart but with the options to check on the 1min, 5min and lower time chart to make sure all the relevant indicators are moving in the right direction before my EA enters into a trade.  So if I can use a 4hr chart with "shorter" time frame, I would be very happy to start using 1hr or 4hrs time chart.

Although I use 1min or 5min time chart, my trade stay open for about 2 to 3 hrs and it has about 800 to 1300 pips per trade.  The challenge using 1min or 5 min time chart is to get the relevant indicators to reduce the false signals and the need for longer historical data for back testing which FSB only has about 1.5 months of back testing results generated.

We are measuring the movement of price, we are not measuring the indicators as they are derived from price. I do not think you have to check a one minute bar to measure price on a 4 hour bar. I think you will miss more by depending on the one minute bar and perhaps cause yourself to over trade.

Please keep in mind that the bars coming from your broker are not necessarily accurate, also keep in mind that the demo server is not spewing out what the real time server is sending.... the demo is set up to make you confident, the real time is set up to steal your funds. Hopefully you are using the real time data as Popov demonstrated in one of the videos.

As far as data, you can download a lot of good quality data from jforex or dukas..... and load FSB with that....

Depending on how few indicators you use, you can depend on the results derived from 50,000 bars. if you have several oscillators you will need a lot more bars and constant optimization.

That's why Popov likes a maximum of 4 slots and I have seen some of his strategies with only two slots. they are more accurate.

In the old version of Forex Strategy Tester there was a scalping strategy--- 2 indicators  for scalping one of the indexes.

I think I am making a case for very few indicators in a strategy. I like 2 for my own stuff.

As far as to what you want as an indicator configuration....... try whatever you feel might be suitable and make it work. For sure my opinions are just opinions.

There are a lot of cool tools in FSBPro, it is taking me time to learn to use them all.

I am still watching the videos and picking up little things from week to week.

It is ok to overwrite the files

You will have to open the folder once in a while to clean out older files that have been duplicated.

Good practise to open the folders once in a while anyways, you never know what garbage may be accumulating.

So by maximizing the bars in the MT4, it is like expanding the duration of period of data saved?

That means if every month I overwrite my files, does my data grow larger and larger over the time?

Eg if I started to collect 1min data since April 2015, does that mean whenever I overwrite the files and save it, the files will still have the data since April 2015 and if I kept doing this for the next 5 years, would I have the historical data history from April 2015 till April 2020?

I need longer 1min data history to make sure my strategies are profitable over a longer period of time and not just currently based on FSB's 1.5 months of data for 1min chart.