You can use a data bar rule in Spread Windows Forms to make it easier to see differences in the range of data. The data bar rule uses a bar that is displayed as the background for each cell. The length of the bar corresponds to the size of the data relative to the other data in the worksheet. The longer the bar is, the greater the value in the cell. You can specify the value type and the value to compare in the conditional format for the data bar rule.
Value Type
Description
Percent
The minimum value in the range of cells that the conditional formatting rule applies to plus x percent of the difference between the maximum and minimum values in the range of cells that the conditional formatting rule applies to. For example, if the minimum and maximum values in the range are 1 and 10 respectively, and _x_ is 10, then the value is 1.9.
Highest Value
The maximum value in the range of cells that the conditional formatting rule applies to.
Lowest Value
The minimum value in the range of cells that the conditional formatting rule applies to.
Formula
The result of the formula determines the minimum or maximum value of the cell range that the rule applies to. If the result is not numeric, it is treated as zero.
Percentile
The result of the function percentile applied to the range with x.
Automatic
The smaller or larger or the minimum or maximum value in the range of cells that the conditional format applies to.
Number
Number, date, or time value in the range of cells that the conditional formatting rule applies to.
Valid percentiles are from 0 (zero) to 100. A percentile cannot be used if the range of cells contains more than 8,191 data points. Use a percentile when you want to visualize a group of high values (such as the top 20th percentile) in one data bar and low values (such as the bottom 20th percentile) in another data bar. This is useful if you have extreme values that might skew the visualization of your data. Valid percent values are from 0 (zero) to 100. Percent values should not use a percent sign. Use a percentage when you want to visualize all values proportionally because the distribution of values is proportional. Start formulas with an equal sign (=). Invalid formulas result in no formatting applied. The minimum and maximum types can be different. The Maximum property should not be set to a ConditionalFormattingValue value such as ConditionalFormattingValueType.Min or ConditionalFormattingValueType.AutoMin. An exception will occur in this case. The Minimum property should not be set to a ConditionalFormattingValue value such as ConditionalFormattingValueType.Max or ConditionalFormattingValueType.AutoMax. An exception will occur in this case. You can also specify borders, colors, and an axis. This example code creates a data bar rule and uses the SetConditionalFormatting method to apply the rule. 
Data Bar with Values
C#
private void DataBar_Load(object sender, EventArgs e)
{
//Add sample data
string conStr = "Provider=Microsoft.JET.OLEDB.4.0;data source= C:\\\Program Files (x86)\\\GrapeCity\\\Spread Studio 8\\\Common\\\nwind.mdb";
string sqlStr = "Select Quantity from [Order Details]";
System.Data.OleDb.OleDbConnection conn = new System.Data.OleDb.OleDbConnection(conStr);
DataSet ds = new DataSet();
System.Data.OleDb.OleDbDataAdapter da = new System.Data.OleDb.OleDbDataAdapter(sqlStr, conn);
da.Fill(ds);
fpSpread1.ActiveSheet.DataAutoSizeColumns = true;
fpSpread1.ActiveSheet.DataSource = ds;
fpSpread1.Sheets[0].RowCount = 15;
fpSpread1.Sheets[0].Columns[0].Width = 100;
FarPoint.Win.Spread.DatabarConditionalFormattingRule d = new FarPoint.Win.Spread.DatabarConditionalFormattingRule();
d.BorderColor = Color.Red;
d.ShowBorder = true;
d.Minimum = new FarPoint.Win.Spread.ConditionalFormattingValue(0, FarPoint.Win.Spread.ConditionalFormattingValueType.Number);
d.Maximum = new FarPoint.Win.Spread.ConditionalFormattingValue(15, FarPoint.Win.Spread.ConditionalFormattingValueType.Max);
fpSpread1.ActiveSheet.SetConditionalFormatting(0, 0, 15, 1, d);
fpSpread1.Font = new System.Drawing.Font("Calibri", 11);
}
VB
Private Sub DataBar_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
'Add sample data
Dim conStr As String = "Provider=Microsoft.JET.OLEDB.4.0;data source= C:\\Program Files (x86)\\GrapeCity\\Spread Studio 8\\Common\\nwind.mdb"
Dim sqlStr As String = "Select Quantity from [Order Details]"
Dim conn As New System.Data.OleDb.OleDbConnection(conStr)
Dim ds As DataSet = New DataSet()
Dim da As New System.Data.OleDb.OleDbDataAdapter(sqlStr, conn)
da.Fill(ds)
FpSpread1.ActiveSheet.DataAutoSizeColumns = True
FpSpread1.ActiveSheet.DataSource = ds
FpSpread1.Sheets(0).RowCount = 15
FpSpread1.Sheets(0).Columns(0).Width = 100
Dim d As New FarPoint.Win.Spread.DatabarConditionalFormattingRule()
d.BorderColor = Color.Red
d.ShowBorder = True
d.Minimum = New FarPoint.Win.Spread.ConditionalFormattingValue(0, FarPoint.Win.Spread.ConditionalFormattingValueType.Number)
d.Maximum = New FarPoint.Win.Spread.ConditionalFormattingValue(15, FarPoint.Win.Spread.ConditionalFormattingValueType.Max)
FpSpread1.ActiveSheet.SetConditionalFormatting(0, 0, 15, 1, d)
FpSpread1.Font = New System.Drawing.Font("Calibri", 11)
End Sub
This example sets border and fill colors for negative values. 
Negative Values in Data Bar
C#
fpSpread1.Sheets[0].Columns[0].Width = 100;
fpSpread1.Sheets[0].Cells[0, 0].Value = 2;
fpSpread1.Sheets[0].Cells[1, 0].Value = -1;
fpSpread1.Sheets[0].Cells[2, 0].Value = 5;
fpSpread1.Sheets[0].Cells[3, 0].Value = 3;
FarPoint.Win.Spread.DatabarConditionalFormattingRule dataBarRule = new FarPoint.Win.Spread.DatabarConditionalFormattingRule();
dataBarRule.AxisPosition = FarPoint.Win.Spread.DataBarAxisPosition.Automatic;
dataBarRule.BorderColor = Color.Blue;
dataBarRule.NegativeFillColor = Color.Red;
dataBarRule.NegativeBorderColor = Color.Firebrick;
dataBarRule.Gradient = true;
dataBarRule.Maximum = new FarPoint.Win.Spread.ConditionalFormattingValue(FarPoint.Win.Spread.ConditionalFormattingValueType.AutoMax);
dataBarRule.Minimum = new FarPoint.Win.Spread.ConditionalFormattingValue(FarPoint.Win.Spread.ConditionalFormattingValueType.AutoMin);
dataBarRule.UseNegativeFillColor = true;
dataBarRule.UseNegativeBorderColor = true;
dataBarRule.ShowBorder = true;
FarPoint.Win.Spread.ConditionalFormatting cf = new FarPoint.Win.Spread.ConditionalFormatting(new FarPoint.Win.Spread.Model.CellRange(0, 0, 4, 1));
cf.Add(dataBarRule);
fpSpread1.ActiveSheet.Models.ConditionalFormatting.Add(cf);
fpSpread1.Font = new System.Drawing.Font("Calibri", 11);
VB
FpSpread1.Sheets(0).Columns(0).Width = 100
FpSpread1.Sheets(0).Cells(0, 0).Value = 2
FpSpread1.Sheets(0).Cells(1, 0).Value = -1
FpSpread1.Sheets(0).Cells(2, 0).Value = 5
FpSpread1.Sheets(0).Cells(3, 0).Value = 3
Dim dataBarRule As New FarPoint.Win.Spread.DatabarConditionalFormattingRule()
dataBarRule.AxisPosition = FarPoint.Win.Spread.DataBarAxisPosition.Automatic
dataBarRule.BorderColor = Color.Blue
dataBarRule.NegativeFillColor = Color.Red
dataBarRule.NegativeBorderColor = Color.Firebrick
dataBarRule.Gradient = True
dataBarRule.Maximum = New FarPoint.Win.Spread.ConditionalFormattingValue(FarPoint.Win.Spread.ConditionalFormattingValueType.AutoMax)
dataBarRule.Minimum = New FarPoint.Win.Spread.ConditionalFormattingValue(FarPoint.Win.Spread.ConditionalFormattingValueType.AutoMin)
dataBarRule.UseNegativeFillColor = True
dataBarRule.UseNegativeBorderColor = True
dataBarRule.ShowBorder = True
Dim cf As New FarPoint.Win.Spread.ConditionalFormatting(New FarPoint.Win.Spread.Model.CellRange(0, 0, 4, 1))
cf.Add(dataBarRule)
FpSpread1.ActiveSheet.Models.ConditionalFormatting.Add(cf)
FpSpread1.Font = New System.Drawing.Font("Calibri", 11)
MESCIUS inc.